Hey girls! Has anyone else experienced this? Yesterday, my period star…

Hey girls! Has anyone else experienced this? Yesterday, my period started. In the morning, I woke up and went to make coffee, then went to the bathroom and noticed that my underwear was wetter than usual and there was a bit of blood. It wasn't heavy, it only got stronger towards the evening, until then everything was as usual. I lay down to sleep with my son, and suddenly my stomach and lower abdomen started hurting so much that I couldn't breathe, I could barely get up, it felt like my stomach was a stone! This lasted for a few minutes and then it eased, but then it started again. It just hurt after that, my husband came home and I took a pill. Today is the second day, and it's still light and my stomach hurts :( What should I do? What have you done? I'll write to the doctor and go see them after it's over.