Period advice

Okay I got my period last month 12/2/17. They last about 3-4 days, a week and a half later I had sex then that following week day I was SO SICK with a 102 degree fever taking antibiotics, this is the week I typically start ovulation. This was also final exam week at my university it was hell. About a week and a half later I had the lightest pink discharge, but I didn’t think anything of it. My period was suppose to come on the 3rd or 4th but still nothing. I have been working out again but nothing too crazy, opinions? Besides being pregnant.