Cramping and clear discharge

i have been on the pill for 5-7 years... never miss a pill, my period comes every 28 days like clockwork.

i had unprotected sex with my fiance exactly 6 days before my period was scheduled to start (8 days ago today).

i don't have my period, but i do have some cramping and some clear discharge. feels just like a regular menstrual period is about to start. no other symptoms.

negative home pregnancy test, but is it just too early to tell?

i had an extremely stressful month with definite disruptions in sleep schedule.