Implantation???

Ok so I’ve been cramping on my right side for the past 2 days. I’ve been feeling more sleepy than usual, crampy, nauseous, and have a little bit of heartburn and I had very light pink spotting only showed when I wiped and my period isn’t due until next week. My last period started March 13 and ended on the 18. Could I be pregnant???

I’ve had sex a few times after my period.