My brother in law, a very well educated person, told me that I got the parasites because I licked the ass of a dog. He said that so that I would stop talking about them.
Keep the information about parasites to yourself. Explain to your boss that you are having some digestive issues that require some extra attention right now. Emphasis that it is temporary.
Your anxiety should diminish and your teeth grinding will probably disappear once you get past the first few months of cleansing. parasites make the extremities cold. In your case it may be the mouth area. We are all different.