i feel as if there is something crawling in my anus and also some times around my testicles and even as far down as my leg. i can feel them go in and out and it is very discomforting. there's also a pinching feeling on and off inside my anus. i just want it to go away. i've been to the emergency room as well as a gastroenterologist, both of which told me they see nothing wrong. i've taken mebendazole and some over the counter medicine, but they don't seem to be working.