Caution about peppermint to reduce symptoms

I've had autoimmune troubles for years and have had severe allergic reactions to medications, including all antibiotics now, so I've become afraid to take anything. However, with most of my troubles, I've found there's enough literature on subjects like candida, food allergies and such, that I can figure out my problem and find a natural remedy that helps. I haven't found doctors to be helpful with any of my problems yet and they're not helping with this COVID business either, so I'm trying to figure out a solution myself. A lot of herbalists are quacks, though, so you can't believe everything you hear. However, there might be some good common sense advice out there. Has anyone heard any. I'm researching now. I will post if I find any and it proves helpful.