Endo or birth control

So I used to get my period every two weeks (that was for like a year to 1 1/2 years) and I just got on birth control in may and that’s when I had my first period whilst on the pill and when my period started getting worse, more blood clots, my first period on the pill I could hardly walk because of stabbing pains in my vagina and uterus and my cervix would hurt and when I tried to poop it would hurt like by my cervix for some reason. And the past 4 periods (thisnis the 4th on bc pill) it always is bad where it hurts to much when I walk etc. and so I was wondering if I could have endo (my cousin had it and it’s possible for me to have it)or if the hormones are messing with my body and making everything worse even tho now I don’t get my period as often. I will be going to the doctor and gyno to get checks but idk yet. It’s to the point where I know when I go back to school I will not be able to ever make it through the first 4 days of my period as it’s to the point I can’t walk, I am miserable on my period and like I said can’t walk I have to lay down with a heating pad and Tylenol and pills aren’t working for pain