That sounds like a nightmare. Don't take your life! There's always a solution.
I second #76356's ideas about B12 supplementation, etc. If you are being eaten by parasites, it's hard to get enough nutrients to think clearly.
Have you tried juicing? That's another good way to get nutrients. Drinking ginger juice can help a lot. Also, any of the recommended cleanses, such as the liver flush, could help.
I am no expert, actually I have only recently discovered that I have parasites, but I can assure you that things can and will get better. There are some real experts on this forum and they can help you put together a plan that works.