What to do? Can't pee

When I was younger I saw a urologist and was diagnosed with dysfunctional void. Where I have to strain to urinate. Now I have the problem that it is very hard for me to urinate at all. It used to be that I would go for a couple days without being able to pee then I would get cathed at the hospital then I would be back to normal. Then a while later the cycle would start again. Well this episode I didn't pee for four days went to the ER was cathed kidney function is fine, but I am still having a very hard time getting myself to pee. It's nearly impossible for me. We are trying to get me in with a urologist but it will probably take a couple months. So what do I do in the meantime? I am very uncomfortable most of the time because my bladder gets full. There are times where I can't move because it is so uncomfortable, but I still can't urinate. I am a minor so I can't just take myself to the doctor. My dad thinks it is just psychological that I can't get myself to pee. I don't know what to do?