Stabbing pain left side under ribs and vomiting 20 days late for period what could it be?

See your doctor: You have symptoms which could be serious and should see your physician. He/she will listen to you, do a physical examinarion, run some tests, and let you know what's going on.

Pregnancy?: What do you think it could be? Vomiting 20 days while late on period. Your left rib pain probably coincided with the vomiting . It likely is if they are close in time, first thing is to get a upt and say whether or not u r pregnant, from there we are in a much better position to help. Gd luc.