I've just joined the forum although I was diagnosed 4 years ago. I was not sure what sort of things people discussed and I didn't want to read things that would make me feel worse.
I too am gay, or more accurately bisexual.
You say you are about to be diagnosed officially. That seems odd that you may have found out "unofficially" which is not ideal.
I can understand you feeling so daunted but am not sure what I can say to alleviate this. All I do know is that there are many effective medications which are capable of controlling the symptoms and the sooner you are prescribed something the better.
Please let me know haw you get on.