I saw most allergic reactions/anaphylaxis with pfizer covid-19 vaccine happen because of peg (correct?). if thats the case, if i never had problems with skin creams containing peg, does it mean i am not allergic to it and vaccination should be fine?

Very impressed that you saw so many episodes of anaphylaxis with the Pfizer COVID-19 vaccine. My hospital has immunized over 4500 employees and we (may) have seen 1. No correlation between ingredients in skin creams and coronavirus vaccines. Vaccines are proving to be extraordinarily safe and most concerns are much more based on irrational fear rather than fact.

you should have no problems. Good Luck