Had protected sex on 6/18 started menstrual 6/23~6/26 and on 6/28 cramping and on 6/30 through the day when i use the bathroom when i wiped their was light blood what can it be?

Depends: Knowing where the blood was emanating from is essential. If this was vaginal bleeding, that could be normal, or from sexual trauma or minor infection. If this is from the urinary tract then you really need to be evaluated by a doctor. I suspect the former, but only you can tell. Is there blood in your urine? Good luck.

Mid cycle spotting: Could be from hormonal changes or imbalance, ovarian problems, implantation of fertilized egg etc. See your gyn for persistent or worsening symptoms. God bless you! ://www.Ehow.Com/list_6737160_causes-spotting-middle-cycle_.Html#page=0.