So worried and scared about possible pregnancy. whats wrong with me?

Im so scared ok so last month me and my boyfriend were messing around NO SEX and we dry humped and makeout im afraid cause pre cum or maybe cum soaked through his i 99% sure it was not actual sperm it was pre i couldnt see it through his pants just mildly feel it also he check and almost finger me he licked and wiped befor just he didnt even touch my vagina AT ALL could i be pregnant i was worried sick i got all these symptoms im so stressed its febuary 12 and im tired of stressing and being scared of everything i had my period on the 24th of january i was very stressed and i took so many midols to stop the bleeding and it stopped i have irregualr periods the reason and answer i wamt the most is now i have this brown stuff coming out my vagina looks like blood its brown and heavy its been happening for 3 days started off light now heavy what is this brown stuff! am i pregnant or whats wrong with me and the same thing happend about a week and a half ago! Is this old period blood or what plz help me it was all pre cum am i just stressing and thinking stupid stuff also im only 13 i cry and is worried and scared please help me is this even possible or am i overreacting also he had jeans on and i had sweat pants and panties