How Can i Get Help With Schizophrenia...?

i Haven't Been Diagnosed, So It Isn't Affirmative But i'm Quite Positive That i Have It. i've Been Aware That Something Wasn't Right Or Just Completely Off, About Me Since i Was Around Six And Have Been Hiding It Since Then Which Has Been Extremely Difficult. At The Beginning Of The Summer i Told My Older Sister About It (Or At Least As Much Of It That i Could Get Out) And She Had Asked Me If i Wanted Help. And i Couldn't Even Bring Myself To Answer Because i Felt So Ashamed. Its Been A Couple Months Since Then And Nothing Has Come Out Of That Talk. i Don't Know How To Bring It Up Again, It Was So Hard The First Time And i Just Don't Know How To Go About It Again. Its Been Particularly Bad This Month And i Really Feel Like i Need Help Because i Read That Prolonged Untreated Schizophrenia Isn't Exactly Great For The People Around Me. i'm Only Sixteen And i Think i Might Still Have A Shot At Being At Least Semi-Decent If i Was Given Proper Help. im Just So Scared And i Feel Like Such A Stupid Coward. But i Truly Want Help. Another Factor Of The Problem Is That im Scared Of My Mother Finding Out. i Know She'll Have To Know But I Just Don't Like Her Worrying About Me. And Medication Or Treatment Or Whatever Is Going To Cost Money Which My Family Doesn't Have A Lot Of. That's Another Issue. Please Help, i Really Need To Figure Out How To Ask, Once More, For Help From My Sister.