Why am i so sad all the time i hate it!?

okay im 16 years old and for some reason ever since like a month ago ive felt deppressed a lot not like thoughts of suicide just everything that used to interest me a lot dont anymore i hate it i wana be myself again whats going on? its scaring me, this isnt who i am ive always been a very outgoing person this is driving me crazy, ive been taking these weight lifting multivitamins called animal pack which i axually think might be causeing it i just stoped them today and went to a normal one could that really be the cause? im embarred to tell my parents that i might have depression i dont wana have to get prescription meds how do i solve this