Im scared! period gone wrong!?!?!?!??!!!!!!?!???!?!!?

'm 13 and i got my first period january 5th. then i got my next one feb. 8th, and now it is march 14th and i still haven't gotten it... . i've been getting bad stomach aches and cramps lately too.
idk what's wrong... and the pregnancy test came to negative. does it still sound like i'm pregnant or is it just a missed period? i'm young and it's only supposed to be my third one...
i DIDN'T have sex. a little of my boyfriends pre-ejaculation got on my hand and i started to rub myself with that hands, but not inside... oh, and my boobs are getting bigger and i have gas
WHAT IS IT? HELP ME PLEASE!!!!!!!Im scared! period gone wrong!?!?!?!??!!!!!!?!???!?!!?
you sound fine...when you first start your periods they are never regular...its not that you missed it..but that your body is still trying to deal with all the hormones related to getting your period. If the pregnancy test came out negative then you shouldnt be pregnant. Getting gas and cramps are a sign that your period is going to be coming soon so just wait it out. The stress that you are having over this may be causing the delay also. You just need to calm down for now. Your body is still trying to regulate itself. I'm not going to lecture you on safety but now that you have started your period you need to be more careful with your boyfriend. You are still very young and you don't need any little rascals running around just yet.
its alright to have irregular periods now, i also went through that when i was just having period for the first time. there could be some cramps before and thats pretty normal. but just be careful about your relationship life cause you are still young.