Yes. It's hard to say which parasite you have, it could be several.
Fibro and chronic fatigue are two very real symptoms of parasitic infection. Joint pain and brain fog too.
If you research cure zone you will find many possible treatments. The only one that has helped me is the protocol by Mattk3 and I tried many over the last 2 years.
After 4 months I'm stable. It's a long process because the bugs are encysted and hard to get the meds to them so I've got to be vigilant and keep the new births beat back... Frustrating at times but I'm in for the long haul. I don't know how to link anything on here so search mattk3 if you are interested in learning. Good luck and I'm sorry you had to seek answers for this.