How does your pain while pooping feel?

I have adeno and possible endo and it doesn't happen all the time for me, but when it does (especially on my period), it feels like very bad contractions, feels like it's going to be unbearable for a few seconds, then calms down quickly, then again bad ""contraction"" until I'm done. But I'm not sure this is related to endo since my doctor mentioned that I may feel like there is a specific point that hurts. How does it feel like to you?