I have been on tri-Sprintec BC for a year now. Two weeks ago I was prescribed amoxicillin for a root canal. Two days after beginning the antibiotic, my husband and I had intercourse. He pulled out before ejaculating, bc that is just what we normally do. I did not think anything about being on amoxicillin. Last week I noticed a pin sized drop of blood one time when I wiped. Today I began my inactive pills. I just noticed some white discharge when wiping. Is this normal or is pregnancy possible?