Two things I would consider if I were you:

1. I have gotten more sensitive to chemicals as I've aged, and can no longer stand to go into places that are heavily perfumed like Bath and Body Works, many clothing stores, walking past the women's counters in many stores where they have all the perfumes....these are now off limits and literally make my eyes water and give me a headache! I don't know why, other than to suspect they are using harsher/more chemicals than they used to and/or I am just more sensitive.

2. Zinc deficiency is known to cause issues with our sense of smell. It is very dangerous to supplement minerals unless you do the research, so be smart about it if you think this may be an issue for you. Also, many minerals need other minerals in certain ratios to work properly (or not cause a problem).

Many PWP report issues with their sense of smell also bnd that may be true in your case....but I would keep other causes in mind, as possibilities. I think too often docs just attribute everything to PD and sometimes, there really is something else at play.