I have not had sex since Aug. 4-5. It was not unprotected sex , I am on depo , and lately I've been a little stressed out ... This week and a little last week when i wipe after peeing its light pink blood , sometimes red. I do wear panty liners because sometimes it gets in my underwear. Its not alot in the liner , but it's enough & im a little worried . Should i be ? What can possibly be wrong?