Pale yellowish/white discharge...no period yet

i’ve been having milk white discharge for a few days now but when i woke up this morning i had a pale yellowish tinge to my white discharge. it was a little sticky but mostly dry. I’m 7 days late for my period but my period is also irregular so i’m not sure and i’m on birth control. I have protected sex with my bf a month ago then unprotected sex a few days ago and weeks. WHY AM I HAVING THIS DISCHARGE? i’m not having signs that i could be pregnant i’m just very stressed. Light headaches, boobs feels fine, idk what’s going on