so my period was supposed to happen Wednesday the 16th so obviously it's late. i did have protected sex last month on the 18th, the day after my last period ended. I just had a uti about a month ago but I sort of feel like I'm having another one. it kinda feels like a sharp pain in my vagina....is this a uti or could I be pregnant????? plz help!! I also have been sick for about almost 2 weeks so could that be effecting my period??