Any support groups in Berlin?

Any support groups in Berlin? Preferably English speaking ones, I wrecked a presentation today and being a masters student + stuttering is so frustrating and embarrassing. I wanted the floor to swallow me whole. I didn't have any friends before because I'm new here, and after this presentation I don't think anybody would like to be friends with someone like me. I just hope I get to interact with other people who understand the feeling.