Tapeworms and other parasites usually live in your intestines. This could be a nerve issue. Maybe it just feels like there's something there? If it is your nerves doing this, once they find the underlying reason, it should go away.
Also, there hasn't been a case of trichinosis in like 50 years in the U.S. from commercial pork, so don't worry about that specifically.
The only meds are what a doctor can prescribe. Go to your primary care doctor. He or she may want a stool sample and a blood test. Write down all your symptoms (not just the crawly feeling), when they started, and when you feel them most. Also write down any questions for the doctor and make sure they're answered. Good luck.
