This is Dr. David
first tries of sex can be very very difficult and can be painful and sometimes there can be spotting.
if she is small and if he has a large member and if she had vaginal dryness, she may not have been ready for sex at that point.
I doubt the spotting is due to cancer at her age
she should have some KY jelly lubricant ready during sex to use to help with lubrication which can take the pain away and make it more pleasurable.
KY jelly can be purchased at the local drug store
I'm glad her exam was all clear of sexual transmitted infections.
your daughter and boyfriend can try slowly again. make sure they use some form of birth control like a condom if she doesn't want to have a baby at this point
and also have some KY jelly to help with lubrication.
let me know if you have other questions.
if done for now, please leave positive rating of 3-5 stars so I can get credit for helping you today
we only get credit for helping clients after positive feedback
you can always reach me directly with "a question for Dr. David" in the medicine or oncology categories if you have other questions
here is my website if you need to reach me:
Thanks for using JustAnswers.com