Pierced ears getting infected?!

Suzanne • One ☀️ baby👧🏻2/14/17, one Angel 👼🏼Oct 2018, one🌈👶🏻 11/21/19 All conceived via IUI
This week my ears have been infected where my ears are pierced and I wear the same 14k white gold stud earrings everyday in my second holes! Gold has always been the ONLY thing I can wear in my ears without getting an infection. Could it be something else causing it or because I'm pregnant?? I see my OB for first appt Thursday and I will ask, but holy moly this is nuts! Lol anyone else ever heard of this before?