What Causes Vaginal Spotting And Dizziness Post Intake Of I-pill?

My last periods strted on 24th june...n my next cycle shud start by 21st july...but on 19th july my boyfriend and me didnot hv sex bt he placed his penis on my clitoris and we both had no clothes on...we both are still virgin...after this he cumed in the washroom and we didnot have any physical contact after that...on 21st july i got very light blood flow which lasted for few hours...we freaked out so mch as i didnot get periods and there was just little flow tht too little brownish...so on 22nd(today) morning i had an ipill ie. 66hrs after the act and i am bleeding little bit today too...slighlty more than 21st...n feeling a bit dizzy...am i pregnant?? Wht to do??..