I just need some answers.

A lot of people on here are judging others. So say what it want but I just want some answers. Being the 16 year old.. Every time I look up what's wrong with me. Pregnancy sites and symptoms pop up. So it's really scaring me. Ive been having unprotected sex with my boyfriend since ive been with him (5months). he uses the pull out method. just just 1-2weeks ago we almost got caught. so just as he tried to pull out. he said he had came but he didnt know if it was in me or on the sheets. he was too scared of getting caught and didn't pay attention. I've been having bad headaches throughout the whole day/night. I do have a very irregular period (skip three months, get it two-three, then skip again). I am currently on my period now, yes you get bloated when on it. But this type feels like my stomach is sticking out so far, it hurts suck it in. Just below my stomach on the sides feel hard.. I'm always getting this feeling of wanting to vomit but never do (I haven't been able to for over a year now). At night I get very hot to the point I'm sweating like crazy, but once the sheets come off I'm frozen and chills all over. Sometimes my boobs start hurting as well as my nipples and itch almost all the time. Maybe I'm just scaring myself...