These are not roundworms or pin worms. They look like small rope worms to me.
Don't waste your money on a doctor. He will tell you nothing and may try to convince you that you need psychiatric help. Stop the Antibiotics . They will only make your problem worse, as they destroy the good bacteria in your gut.
BTW, how long ago was your last vaccination, flu shot, etc?
And you are correct about not eating veggies unwashed. A very bad idea.