Gag reflex (not why it sounds like)

AF Isn't due till the sixth the last Couple days my gag reflex has been really sensitive I work in a nursing home and as a nurse aide you see and smell a lot of different stuff, i had to clean up BM yesterday and it had the worst smell to it but just the thought of cleaninG it up made me gag! And today like the taste and everything of some things makes me gag.. My question is could this be AF related or could I be pregnant? I've never had a sensitive gag reflex before my AF so this is all new to me