my messed up period life!

Shay
Hi, my names Shay. I'm 22. When I was a senior in high school, I was diagnosed with stage 4 endometriosis, yay right! Well that was the beginning to ALL my problems. First I have the WORST periods ever, second my periods are NEVER the same, light or heavy, third they are never at the same time every month. I got this app to try to help track them, but yeah that's not working out so well for me. My boyfriend freaks out every time it's late, which is every month, which stresses me out. Which makes it even more late. I just don't know what to do, I'm on birth control to help regulate them, but yeah, that don't work for me either! Had anyone else had this problem?