I had worms that lived in nests and it took time to build up the poison in my system to expel them.It was on day 24 of a parasite protocol that I expelled one of the nests.
Try using diatomaceous earth, Vitaklenz and Activated Hydrogen water. Do it for a whole month starting 5 days before the full moon. Do enemas or colonics or salt water flushes.
You also need to use something to destroy the bio film they create/live behind.
I have a detailed parasite protocol on my blog on CZ- Getting the parasites Out. # 4190. I am still in the process and keep experimenting. OR Google Dr. Andreas Kalcker and read his parasite protocol. Watch the AutismOne 2014 YouTube videos and listen to him and Kerri Rivera. Read her book, Healing the Symptoms Known as Autism by Kerri Rivera . Ridding parasites from autistic kids is critical and she has great advice and Dr. Kalcker's protocol broken down day by day.
I have gotten rid of three nests of worms and estimate that I had 7-9 different parasites. They don't live alone. They don't all come out at once. They don't even come out in the same moon cycle.
Don't waste money on tests or Dr.'s.
This is a long term (12-18 month) do it yourself healing.