Advice on what to do next?? :(

So some of you may already know me on here, but Im lost at what to do now.. Ive been to a bunch of docs who wont listen to me or believe me, and yes i know a lot of people here are dealing with the same... I know for sure I have some sort of parasite problem I just dont know exactly what one!!
My guess is either some kind of roundworm or tapeworm.

My symptoms

Weight loss 15-20 lbs from diaherra over a month or two.
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my eyes have floaters and more senstive to light,yellowish tint to them and sometimes blurred vision

-Grinded my teeth alot when i first got sick, now they are in bad shape (Im only 26 yrs old)

-Stomach make strange noises all the time

-cant seem to gain my weight back

The docs ahve given me a few stool tests all negative.. but i think my problem is systematic,whcih they dont believe me, I even have a thing in my eye that looks like a mini candy cane!! They refuse to help me and just decided to give me anti-anxeity meds which I have never took before, and i refuse to take them.
I been to two big university hosppitals in my state, but havent left the state yet for help.
Also when I got sick I was working at a public pool at a low-income HUGE apartment building in the city. And right before i got sick (about 3-4 hours) I ate a big meat combo grinder from a public market.

Any suggestion at what my next step should be?? THANKS!!