Pregnancy symptoms before missed period

Is it possible to have very early pregnancy symptoms prior to your missed period?

My husband and I had unprotected sex the day before and the day of ovulation. I am 6 days away from my period. Ovulation was 8 days ago. My nipples have been getting weird throbbing and random sudden sharp pain that only lasts a second or two. I’ve also had an abnormally high libido and I usually have no libido at all!! Sorry for all of the TMI!!