Well it sounds promising @Rach1384 with all those symptoms. I'll keep my fingers crossed for you. Are you temping? I use Ovusense and I've found it really good at identifying ovulation. There's a lovely Facebook group too. Many of the women on there have had similar problems to you. The price is a little off putting but Its really helped me understand what's going on. Sometimes there are discount codes.
I don't know much about endometriosis but hopefully it won't cause you any more problems conceiving.
Good luck and let us know how it goes! Xx