Re: What do I do?
Regarding your anxiety about even placing a phone call. Just tell yourself that making a phone call to someone for help will be worthwhile because it's a first step in trying to get better.
And as far as going to a church for help... I don't think that you have to go to the church while mass is in session to make initial contact nor do you have to be a member of the church to ask for help. In most churches, the people who run the church are there daily. Would calling be easier than going there in person? If so, you can look up the phone number, build up your nerves, and call them to explain your situation. I am not an overly religious person nor am I much of a church-goer but I do know that most churches are always willing to help anyone who needs it. If they can't help you directly they might be able to point you in the right direction.
So keep telling yourself "I'm doing this to get better", and try to make the call. Good luck and remember that we are here as well to try give you whatever support we can through our keyboards!