I am so sorry that you find yourself here, but so pleased that you do as you will get support and advice from those who completely understand what you are going through.
My first thought is to get yourself off any social media - I not only defriended my h from f/b I stayed off it for a few months while I got more comfortable with not snooping or contacting him. I put messenger on to my phone so I could still get messages from my friends without going on to f/b itself. Basically the harsh reality is - you snoop, it will hurt.
Everyone is different in how they find ways to cope with the first few months, its really hard I know and I completely empathise with you - I found journaling helped, writing down absolutely everything that was in my head as it was better out than in - in the beginning I went through so many books that I changed to the computer, writing in my journal all through the day. Distraction is the key - finding something that focuses your mind so much that it causes a break in the movie that is playing in your head - I did colouring books, took on a college course and played music very very loudly !!
No contact - now thats a challenge, But the longer you can go without you contacting him the easier it becomes. If he contacts you, keep it short and stick to the question your h has asked and offer/ask no more.
Its time to try and focus on you and your c, find something in your day that is just for you - even if it is a bath or a walk, start off small and work your way up to filling your life with things you enjoy doing - you will see GAL written here alot. Make sure you look after yourself, eat sleep and try not to isolate yourself.
Haunted - you are doing really well, you can and will get through this, we are here to help you through this minefield. Read everything you can, ask questions, knowledge is power when it comes to the MLC crazy.