TTC 6 months

So my husband and I have been trying to conceive for about 6 months. He’s 21 & Im 19. I finally decided to give <a href="">tracking ovulation</a> and Pre- seed a try. We BD every other day within my fertile window & used Pre- Seed each time including the day I got my positive Ovulation test. Im 3 or 4 days past ovulation now & Ive been feeling very light cramping, I know its probably way to early for cramping even with Implantation but I’ve never experienced this before. Anyone know what it could be?