im real sorry reading your post, i feel for you in your situation, having been where you are on more than one occasion, my ex the first time left with my 3 daughters the youngest was 6 months,when i visited i felt my youngest didnt recognise me anymore that cut me up, after losing my house my job my wife and kids all in the same week, it was hell,after being separated for 9 months i pushed to be with her and my kids again, mainly because i didnt want to be without my kids, a few more years together then my x thought the grass was greener on the other side , she left for a younger guy she met at work, leaving the girls with me this time, after only 1 week being left she asked to trade a quick divorce in exchange for easy legal custody for me and my girls,
on the advice given to you not to trust your wife i agree very strongly, if a court case comes up you would be surprised how that woman you thought you knew can say the most wicked things against you, much not true and plenty twisted truths,

on the subject of her mocking you with your slight speach impediment, how about slipping a voice recorder in your pocket, the time may come that you need some defence against her,

as others have said, dont leave your house, if you do you will have no rights left at all,

i would have much prefered to say i hope you can work things out, but from what i read thats not going to happen,

take care of your health, like the doc says take time off, rest whenever possible, try get your mind as clear as possible, walks are great for thinking and clearing your head,

take care of yourself through this, taking care of your health now is vital,

i dont know what else to say, but like everyone here on this forum, our support is here for you