went to the ER yesterday and male doctor said there’s nothing wrong, just my menstrual cycle

so i (20F) just started Tuesday around midday and it was already thrown off because of the size of the clot that started it. i then proceeded to bleed through a super every hour for about 5-6 hours straight, i got nauseous and starting having vomiting and diarrhea and the cramps were almost unbearable and started hurting in my lower back. i was getting weak and had a hard time walking because my legs felt like they were giving out on me. i ended up going to the ER because i had an almost 20 minute long constant cramp that would not go away. my WBC was normal so it wasn’t appendicitis or cholecystitis and i started feeling a little better after the meds they gave me…until about 4 this morning i woke up and it feels like i started the process all over again. i can’t get out of bed to do anything except go to the bathroom.

this just doesn’t feel like a normal or “bad” period. i used to get cramps to the point that i couldn’t go to school because i could only stay in one position to relieve the pain. i’ve had a period for 9 years and have never felt like this before.