Can guilt and anxiety really cause this much physical pain?

I have this cold hard lump of pain in my stomach and have for about three weeks now. It started before going to see my family. I actually delayed my trip by a day due to waking up in the middle of the night due to my stomach being in so much pain. We thought I was having a gall bladder attack. But it would calm and then get worse everytime my anxiety levels increased.

I know I have to decrease the amount of interactions I have with my family, I came to this conclusion when I was visiting. They just aren't healthy for me. But the thought of doing so sends stabs of guilt through my already hurting stomach. I don't know what to do. If the feeling gets worse I may go have my stomach checked out, just in case it isn't anxiety. But I'm pretty sure it is, so maybe I should try to see my psych doc?

My therapist told me that with these feelings of guilt I need to ask myself 'what crime have I commited to make myself feel guilty?'. The answer is none, none of it is a crime, I'm not doing anything wrong. But I can't seem to convince my stomach of that, which I guess means that I'm not really convincing myself of it either. Though it makes perfect sense.