EMSCEE,
I'm so sorry you are experiencing this, but you've come to a place that will share experiences and give advice. I want to emphasize your last point, please focus on yourself. It's a lot easier said than done. My D-Day was in February and i 100% did not take care of myself.
Eat and Drink water: As a previous poster mentioned, drink water and try to eat anything you can. If you can't get a full meal down, try protein bars or anything you can nibble on. I was shocked after two months I had lost way too much weight and looked visibly sick. Mustering the energy to even shower took everything I had. So try to drink as much water as you can and nibble on something.
Sleep: This I still struggle with, so I'm giving advice to "try to get some sleep" knowing it's really difficult. If you're bottling up a lot of your thoughts, try journaling to get some of these thoughts out of your head and onto paper. I find when I rest my head at night all of my thoughts come racing to me, the mental movies, everything. Try journaling, talking to a trusted friend or a therapist to get these moments out of your head and onto paper or a trusted person's ears.
Exercise: Whether you were into exercising before D-Day or not, try to get some exercise in. Doesn't have to be a massive gym routine, but walks outside help a lot. I would leave my phone home and would just go for extremely long walks in my neighborhood to get fresh air and clear my head. As I started to improve my physical health, I have ramped up my exercise routine back to where I was pre D-Day and it's helping out.
I suspect he is still "minimizing" the physical details to save his own shame, and the "I don't know" feeling is exhausting.
You need to put pressure on him to surrender the honest truth. If he wants to reconcile it will never work if the "new" marriage is built on a foundation of lies. The trickling of truth and minimizing of details is one of the worst things Wayward Spouses can do. It's going to make your recovery more difficult if you're still playing the "what else is out there" game. If he truly cares he will make sure he shares everything with you. Just be prepared though, because if he takes you up on it you need to be prepared to hear things that will cause more shock. There are lots of great books Waywards can (and should) buy especially if they are desperate for R. ("How to help your spouse heal from your affair").
He is a professional—a Solicitor—who is now "on his knees" trying to prove he wants "Marriage #2." He’s doing the work—transferring funds for my security, crying at weddings, and promising a Vow Renewal for his 60th birthday.
If he's not reading these books or researching how to help YOU, then he's not actually proving he wants marriage #2. Renewing the vows isn't very promising if the original vows meant nothing to him. His focus should solely be on helping YOU, and part of that is him being transparent and honest so you don't have to carry the burden of constantly wondering what else is out there.
Whatever you decide to do; know you do not have to make any decisions now. You are in a world of shock and pain; the worst type of pain imaginable.
Just know, YOU had nothing to do with this. Another thing that happened to me was my confidence and self worth dropped immensely, when in reality it was my wife who had 0 confidence and 0 self worth during the affair. You can get through this and you will, it is a marathon filled with good days and bad ones. I'm only 3 months out but I'm already beginning to see good days.