I don't now is this normal

Well I started my period on October 6th but I been cramping so bad but I should of started my period on the 23th of October but right know that I when to the restroom I sat down and I felt something that came out of me and lots off blood when in the morning I was it bleeding anymore but like at 11:00 I started cramping again and started bleeding to i don't now if this normal please lady's can you guys tell me what it is should I go to the doctor please someone????im like so scared don't I've now what to think