I'm 16 and I got my first period when I was about 12 or 13. While on my period, it hurts my bottom so much when I unexpectedly sit down or just randomly while standing. This only started this year, it was never a problem before. There have been times when I'm just walking to the kitchen and the pain down there has been overwhelming and I have to stop and grasp something. But it's horrible during a bowel movement. I have to hold on to something because it's near unbearable. It hurts to push and I have to just sit there holding on to the counter till the pain subsides and I can finish my business. This only lasts the first day though. I'm terrified to bring this up to my mom or doctor because I'm afraid of having to go see a gynecologist. If there something that anyone can tell me before it's a necessary to go to the doctor, please let me know.
Did you findout what was the problem? Cause I'm going through the exact same thing...