I'm a big chicken

I'm trying to work up the nerve to get out of my comfort zone, so I was wondering if someone here could give me a nudge.

I've recently learned that the TGI Network of RI has a peer support group that meets on the first and third Tuesdays of every month. I contacted the facilitator and got the information on where to go, but I was too nervous to go to the meeting two weeks ago. The idea of having to reveal my secrets to a bunch of strangers terrifies me even though I know it's extremely unlikely that this group will be anything other than welcoming and accepting. I still haven't convinced myself to attend the meeting tomorrow, despite knowing that it would do me good to have people I could talk to about things my regular friends and family members wouldn't understand.

Can anyone who's gone through a similar situation give me any advice? What did it take to get you over a social hurdle? Or tell me about an awesome experience you've had with a peer support group so I know what I'd be missing out on.