I've felt really bad the last month PLZ HELP?

Ever since about a month ago i have felt like i had anxiety and/or depression but ive never had it my whole life (im 15) so ill start by saying everything that's happened so far. first of all before this all started i was out at my brothers taking a break from being at home cause me and my mom don't really get along,so i must have been out there at least a week then it felt as if i was starting to get a cold so i wanted to go home,well as soon as i got home my mom dropped a bombshell on me and said she had skin cancer.SO quit smoking cigarettes cause i thought i was gonna get cancer too. And i guess i kinda held my emotions in from that,and i started thinking,of how bad of a son i have been to her and it kinda threw me off,like say this, if you went your whole life on the verge of loving/hating someone then found out they died...well when i found out i started to realize how much the good outweighed the bad in our relationship..well soon after that i started having breathing problems that ended up in the ER just for them to tell me nothing was wrong...so i had a follow up with my (PCP) Primary care Physician... and he thought i was having an allergy attack from something i ate so he prescribed an epi-pen just in case it happened again and he also prescribed antibiotics just in case it was just a bad cold or bronchitis, so i went home still having the feeling that was similar to like having a too tight shirt or coat on feeling i was feeling like i was suffocating, i took my antibiotics and laid down soon after that ( the next day i started getting diarrhea and my stomach wouldn't stop grumbling, so i stopped wanting to eat cause it mainly happened then (plus i still didn't have the results back from my allergy test)....so i was only eating small stuff and drinking water, so when i was off the antibiotics the stomach problems stopped but i would still have the suffocating feeling on and off and i started to notice when i kept myself occupied i wouldn't notice it so i constaintlywatched movies and slept,but at the times when i got bored and there was nothing to do i would resort to just thinking and thats when i would scare myself, cause i would start wondering whats wrong with me (cause ive never experenced anxiety or depression before) and then i would look up on the internet symptoms and diesieses and basicly think i had most of them which scared e more cause i dont want to die (mainlky cause idk whats gonna happen to me when i do like im scared that when i die like ill just be gone and all ill see is blackness like when your eyes are closed and ill be like that forever.well back to whats been happning so after i got the allergy tests back there were negitive i wasent allergic to anything so that (even tho it was good news) scared me cause if it wasent allergies then what was it. so the doc said to have me checked for sleep apnea but i dident really think at the time it was that cause i never said it only felt like that at night it was happning all day. so i decided to go out to my brothers for a couple weeks so while i was out there it was my step sisters B DAY so we went bowling then after that he got a new car so i was busy helping him give it small tune ups and replaceing old stuff with new...then i started to notice the feeling it was so strange at the time cause i was thinking about the matrix (the movie) and i started to think and got to wondering what if life is really like that and im not really me but im some computer of the really me was just plugged into one and it was scary to think like that,other than that the other symptoms were barly noticeable with all the stuff i had to do but when it came time to go home i was feeling pretty much normal and i felt as if it was starting to go away and as of now im starting to feel better with everyday that passes but im still thinking about the matrix thing and am even a little scared to watch the movie ever again, but i just want to know if any of the stuff ive told you guys or the things ive experenced have happened to anyone else out there...my brothers coming out to visit tomarrow so i get to go back to his housr tomarow but i just want to feel normal again and not have to worry aboiut every little thing...So plz if anyone finds this plz awnser back.