There's so much going on in my head.
This is normal at this phase. It is like falling off a cliff and not knowing how long the fall will last, but it just seems to go on, and on, and on.
Should I ask for more details on the recent affair?
Only ask what you are ready to hear. This is a personal choice, MC is important if you hope to deal with the marital issues that he has brought into play.
Should I try and contact the OW husband?
Yes, you JFO, and he needs to JFO, and break the daylight wide open on this affair. Kill it with the daylight, if nothing else.
Should I even discuss what he can possibly do or is that a route I even want to go down?
Probably premature. Your husband is an alcoholic, and nothing that he says or does can be trusted until he has resolved his alcohol abuse issues.
It is not how much one drinks, or what one drinks, but what happens when one drinks that define alcoholism.
Just ask me, my wife is at an AA meeting right this moment. She surprised me with her alcoholism, because it was all closet drinking, and not that much, but what she did while drinking was hard to believe.
However, when she started confessing the affair, and the drinking that went with it, and the other drinking, and the other activities that had gone on in secret during our marriage, it was as clear as day. I had a hard time seeing her as alcoholic, but the behavior was what it was and the link to alcohol was what it was.
Should I find out more on alcoholism and confront him with that?
Absolutely. Here is a starting place.
http://www.lanarkleedsaa.org/pages/aboutaa/are_you_an_alcoholic.htm
I'm a member of the online Al-Anon, you should check into it, talk with people, nobody will know who you are or where you are from, and it can be very helpful.
It's like I don't know what to do so I find myself stuck & hope that some soul searching on my part will point me in the right direction.
Come here, ask questions, talk about how you feel.
I didn't find this place until nearly 2 years into my dealing with my wife's affair. I wish I'd know about it before, and I wish I'd been able to get this kind of feedback all along the way, particularly at the beginning when I was just totally overwhelmed by everything and shocked at what I was hearing.
Meanwhile I'm taking care of myself, my baby and tyring to get a clear head.
That is task #1, you cannot make him do anything, you can only do what you can do.
Good luck.