hmm, maybe you could find a cheap taxi?
I wonder if there are any volunteers too, who could drive you there? (Some cities seem to have something like that.) Maybe once there, you could find others who live around where you live, and could give you a ride?
There's a Hearing Voices online forum too.

I think there's nothing shameful in going to a support group! Or are you afraid psychiatrist might find out and up the dosage of meds? What's the worst that could happen if anyone found out?