help pleaseee..

I started my period on July the 30th my boyfriend and i had sex on the 31st. We didn't use protection since I was on my period there was really no consurn for me getting pregnant if he didn't "pull out" in time. Long story short we had to stop because he started to over heat and started to break out in hives and he didn't have his allergy pills on him and his Epi-pen was in his car it was a big mess needless to say. It's now the end of August I've got all my normal pre-period signs..lower back pain,cramps,aching boobs the whole shabang..but I haven't started my period. Am I over reacting or should I be consurnd?!?