If nothing--sex, etc.--has torn the hymen around introitus, then how is it that the dr. had to stitch it up during the exam under anesthesia? he stitched it up after he hit it with the speculum.

Exam under anesthesi: In order to do an examination of the vagina, uterus, etc, your doctor would have had to stretch the hymen (if still intact) to allow visualization of the upper vagina and cervix. If this caused a tear at the hymen, which is likely, she/he would have sutured that to stop any bleeding. Usually such bleeding will be slight and will stop by itself, but sometimes it may take a stitch to stop it.

Uncertain findings: Call the examining physician. A torn hymen does not usually require suturing; however if there was extensive tearing, that may be the reason. Good idea to call the examining physician.