Yes, just after BD I think most of us had problems like that. Along with not eating, not being able to concentrate on anything else during the day, etc. Just try to take care of yourself in every way you possible right now. You can talk to a doctor to get something to help with sleeping, if you think it will help. The headspace mediation app could also help before bed, it can help clear your mind. Exercise will also do wonders for both sleep and depression.
It [censored] Mike, we have all experienced it. It does get better. Try to keep going and focus on yourself, GAL, read those articles Cadet posted, just focus on yourself and S.
Accept what is, let go of what was, and have faith in what will be