No urge to Urinate

[pingpong28]

Please help. With time, I have felt that I am losing the sense of when my bladder is full or empty. I no longer know when I need to urinate. But now, I can't even pee while standing, I need to sit for it.
My stomach feels enlarged, that's when I go to pee. But if I am busy, I may forget, and then its even harder to start to pass the urine. And it comes out in concentrated color as well.
I now slowly feel that I am losing sense of when I need to pass stool as well.
I got MRI and ultrasound (both normal), and doctor feels that problem is psychological.

But I think that I have worms, or some other parasite in my large intestine, that makes gas and enlarges the intestine, that it blocks signals from the bladder or other muscles. I feel this because, before passing the urine, I let out a fart after which it is much easier to pass urine. Since that fart doesn't come when I am standing, I cannot pass urine while standing.
But I may be wrong about this. Please help.

[pingpong28]

I am male, 22 years of age.