we all have different periods and we are all different people...
some women get heavy periods some dont..
some get no symptoms and some of us get REALLY BAD cramps, dizzy tyred etc....(i know those symptoms well)
your best bet is to take a pregnancy test and know for sure.. when you know your results you can always find help and advice to guide you in your decision
because its YOUR decision....
keep in mind that you can have periods and be pregnant..
with my daughter when i was pregnant at first i would get small periods and that would freak me out.. thats when the gyn explained that some women get small periods during pregnancy even if most women dont..
also you mention you do sports.. i fast walk and jog almost evry day ans that sometimes has impact on my periods (light periods)
seriously just take a test you would feel a lot better knowing..sometimes stressing about what could be is worst then the results..
i wish you luck and if you feel you want to share let us know how you are doing..
you can be preggers & still get your period, planned parenthood good idea, planned to Not parenthood sounds like a good idea for the two of you right now too, learn how, you aren't ready.
Good Luck
if your pregnant you wont be having "regular" periods, you can bleed, but if you and your boy friend use condoms correctly every time, and they never slip off, added with the fact that you have 5 day periods every month, i would say pregnancy is unlikely, but not unheard of, since your in high school and active, its very common for young girls to have irregular periods, esecially those who get a lot of exercise, do you have a planned parenthood in your area? if not i would advise you see an obgyn, just to ease your mind, or hey go to the dollar tree(if you have one) and grab a test, you cant beat the price!
hope all works out sweetie;) keep on being safe, and if your able to go to planned parent hood, get some birth control pills while your there