This involves men's (teen) health? Some one help please!!?

Im 15 years old and suddenly today i didnt get my erections like i used to get. Just yesterday i was perfectly normal and i got my hard erections. Im 6inches erect and 4inches flaccid but now its like 3 inches flaccid and not even thinking about sexual things can get me an erection. I'm hoping this wont affect my life, and that its only a temporanly thing. Like in school i used to get erections for no reason and today i dont.
Latley i have been doing squats for execersie... can that be it why i dont get them no more?
And then i just read that if you do a kegel excersive you can have better orgasms... and i started doing it sunday but then i stoped yesterday because i saw no point in doing that... can that be it as well?

Please can someone help me and try to tell me whats wrong with me??
Thank you

well u sound normal to me another thing your worring about ur erections too much just chill 4 now worry when ur about to get laid n u dont get one. n even then u shouldnt be worrry cause u can be nervous or girl aint atractive or ur thinking to much about it. well check out in the web or call a doctor dont be shy they the best to know or ask ur best friend but i think theres plenty web sites that can help u

better go see a doctor dude
There's nothing wrong with you accept you getting paranoid for no reason. if you watch your penis 7/24 you need to focus on something else like sports and schools. At your age you do not get to control your penis.
you might just be going through a hormone change