Wife wants to fight about everything all the time?

Ok so I've been with this girl for 2 years today, married for 7 months. I have a daughter & me & my wife have a 5 month old son together. She is VERY insecure & has admitted that. I have had all I can stand & have put up with it longer than anybody I know would. These fights she starts typically last anywhere from 2 to 5 hours to the point I'm packing my stuff before she finally stops. The fights she starts are always things like me working late, jealousy over my ex always thinking I want to get back with her which I don't & she's never found any proof of evidence that I do. It's like she makes it up, if my daughter's mother contacts me about my daughter anytime, my wife wants to know the instant it happens which is absurd. We separated for 2 months last year because she thought I was going to lunch with some woman which i wasn't. All the trust stems from an e-mail she got from my ex wife a year & a half ago saying we go to lunch all the time which is also a lie. I do not have the daughter with the ex wife. I was with the daughter's mother between the 2 wives. I divorced my ex-wife for cheating amongst other things. The main issue with my current wife is the fighting. And it's about things I have 0 control over. There are just so many examples & I know I'm being an enabler by letting her do it over & over because the 2 times it's came to the point of me leaving she promises all these changes just to butter me up til the next big fight. She ruins my visitation with my daughter starting in about her mother etc., i try to resolve it calmly & quickly & she spouts off the most hateful thing she can & just talks to me like a dog & always turns everything around like i'm guilty because i get so defensive about begin accused of talking to other women. I've given her access to phone, email, facebook, everything & she's never found anything because there is nothing to find. This went on for several months before I changed my passwords because after 5 months it had done no good at all. I give her access to all that & then she brings up my po box of all things, she doesn't know what I do when I'm at work that I could go do anything, I mean its like I can't do anything at all to prove to her I'm faithful. Her ex husband cheated on her & I feel like I'm paying the price. I changed the passwords because I value my privacy & every marriage doesn't have to share everything. And a big reason with the passwords for instance is like an email I get from a friend thats intended for me, a joke or whatever. She's very easily offended & easily insulted & jumps all over me if I can some off-color joke email that is no big deal & boom there's a fight. I didn't do that, I have no control over that. It's not offensive to me. She's threatened to leave enter comments on my facebook page showing public appreciation for her which is also not right. I tell her & show her I appreciate things she does. That should be suffiecient & it's not hers she needs to leave it alone. The point is, this has gone on since before we got married, she promised to quit & work on things & she did but it all changed after our son was born & it's been just as bad as it was before ever since. I'm sick of walking on egg shells all the time. No one in my life has ever bitched at me so severely over so many piddly things ever. She makes mole hills into mountains on every issue & her parents have even told her this. I don't want to take her around my friends because she's so easily offended & I'm just worried about her getting pissed at me over some trivial bs & ruining everything & we have to leave. I just feel like I can't do a thing to please her. She makes every excuse not to work, I owe her everything we can't afford, she quit cooking, barely cleans, bitches all the time, & it's to the point I would rather be at work & rather work late so I don't have to hear it. She starts in on the phone when I'm at work to the point I have to turn it off because she won't quit fighting. She demands apologies for things that are beyond my control. Things that she made a big deal about like wanting me to apologize for something she got mad about that means nothing to the average person. She's very insecure, manipulates every situation to where she's the victim & says the meanest **** behind closed doors & then in public acts like an angel & makes me out to be an asshole because I seem so angry & I have every right to be when I'm talked to like a dog. In any past relationship I've ever had I've never had any of these issues. I can't even talk to my friends on the phone without her trying to listen in & demanding to know what we're talking about. It's just rediculous. I can't even think of all the ****** up **** she's done right now but the list is so lo