I have horrible grammar but please anyone who can bear with me ..i need serious advice?

I might be wrong, and obviously nobody really KNOWS whats going on except her but if she were trully totally innocent, then I don't see why she would explode like that. I think you have a right to be worried when she's messing around with other guys, and be secretive about. I also think it's incredibly horrible of her to do it, especially while you two have been together for so long, have a kid together, and this has happened to you before. If you are this miserable and can't even trust her at all, then I don't think this relationship is going to make you very happy. So honestly you need to try and trust her and really let go. If she acts suspicious again and you actually have proof of more stuff going on, then confront her seriously. If you catch her again then I don't think the relationship is worth it. I'm really sorry and hope things work out for you.