Extreme Cramping - never had before!

I have been spotting for about a week with minor clots (no bigger than a dot I’d say). I thought it was just my menstrual cycle coming up and didn’t pay much mind until last night. I had a cramp so intense it made me throw up. My abdominal muscle were even tightening. I had to pace up and down the hall to try not to puke, but then it made me light headed. I couldn’t lay down because it somehow made it worse. After that had a a regular flow and haven’t had one since. Is this normal?

(I’m 20 and can count on one hand how many cramps I’ve had in the last 10 years.)