I am pretty new around here, but in a very similar situation. I know you are feeling a lot of panic right now, I have had the same on and off for weeks, but it won't help you - if anything it will make matters worse. Try and relax a little, as others have said GAL, try and have some fun, and eat well! For the first few weeks I ate hardly anything and felt awful, I have since been going to the gym and eating like a pig and feel so much better about myself, which it turn makes everything seem easier to deal with.
As for OM, from what I understand there is little you can do about this right now. I am in the same boat, my W says she has no intention of taking her EA any further at this time, but I am not even sure if this is true as I have suspicions this has already moved into a PA.
So my advice is, try and forget about that, don't worry about next week or next month, think about now and maybe tomorrow. You W is willing to give you a chance and you M a chance by the sounds of it, make that time count - a lot of people on here, including myself have a W that has said its over and there is no chance of M working. So although you will find this hard to believe, your are lucky in that respect.
Hang on, be patient and don't panic. (coming from somebody who has done the opposite of that many times over the last month or two!!!)
Me: 38 W: 35 M: 9Yrs T: 15Yrs S8 D5 BD: Feb 13 Still Living Together
I feel like I'm in thick forest, I'm slowly drawing a map of the way out, but not sure yet which side of the forest I will emerge.