Hi!
If you were my patient, I would ask you to come in for an exam. Bleeding after intercourse is common; it is NOT normal: and usually a cause can be found and remedied.
First I would do a pap to rule out abnormal cells on your cervix and also rule out polyps. I would look for any lesions on the outside or inside of the vagina that might be bleeding. I would also look for any signs of infection that might be causing the bleeding (I would offer you testing for STIs too)If we STILL had not found anything, I would suggest an ultrasound to make sure there were no problems with the lining of the uterus, or ovaries that might be the culprit.
Good luck!
Dr B
You could bleed if he is rather large or if you just began having sex. As long as the bleeding stops, you should be ok.