One thing I've found in "support groups" is that they can (don't always) become simply a place to whine and complain about how "no one understands me". I can see how easily that can happen, because when you have no where that you can openly complain without having your symptoms belittled, and are introduced to a group with the same issues who won't belittle you, sometimes it can become a case of " my symptoms (condition, circumstances) are worse than yours". I consider those to be "outlet" not "support" groups. Sometimes that can be beneficial, but only for the short term...then you need to move on to a place of support.
As is so ably demonstrated in this forum, a true "support group" is very much a give and take endeavor, with willingness of all members to provide support for the ability to have receptive eyes and ears when they have the need to complain.
I think what I'm trying to say is "check out a prospective group before you become involved, and don't be upset if it doesn't seem to be what you need, just move on and hopefully find exactly what you need elsewhere"