Sorry you’re having to go through this. ☹
My husband of 20 years left 3 months ago after an affair, still going on. I was devastated and frightened (which admittedly scared the life out me). It has got better and easier to manage the tricky days. Having friends and family to talk to, has been a God send. I’ve also found writing things down, my thoughts etc. has helped me massively, especially when it was still raw. Emotional roller coaster is an understatement but it does get better. Take each day as it comes and being kind to yourself is important. If you need time out from work etc. then do. You know we’re all here, if you need a rant/chat. You’ve got this!