Firstly to give some background information ive been a band for a couple months, i first started screaming in beginging of october 2007 and i practiced a good bit, ididnt know what i was doing so i might have been using my throat.. well now ive been concerned that if that may have affected me, i have been practicing a while to use my diaphram, so i probably did it completely wrong today, or im not sure but my throat feels a little sore and i am concerned if its messed up now?
my question what should the symptoms be or is it just me and my anxiety problem that is making me think this?
-also how can i practice safely?
thanks in advanced

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