I am sorry that you are here but welcome, you have come to the right place.
I will give you the advice that eveyone has given me. Slow down this sitch will not get fixed over night. GAL, take care of yourself and your kids. Read through these post there is a lot of great advice on this site. Your sitch is similar to mine, read and apply some of the advice the Theoden has been giving me. Take a deep breath try and relax.
As you know you are on a roller coaster ride were we don't know the end. Start looking at yourself, start changing the things that you can to make yourself better. You need to stop obsessing over your life with your W and concentrate on yourself.
Do not beg and plead with her it won't work and makes you look weak - you are NOT. I did this and now see how this made me look, this was not me and is not you. Let your wife see the person that she fell in love with years ago.