I have a similar experience as you but not nearly as sever.
How are you doing now?
I was trying to find a link to pin worms photos but can't find it right now for you but from this photo they are tiny and I've read that they are 1/4 to 1/2 inch long and can be confused with a tiny cotton fibers.
I have symptoms of pin worms but have not been able to see one alive. It's mind warping when these things are driving you crazy and you can't see evidence of the d**n things and people don't believe you. Awful!