Welcome to BellyBelly.

It's possible you are experiencing implantation cramps. It would be too early to take a pregnancy test - if you are certain you ovulated on 3rd of June, that makes you only 5 days past ovulation (or 5dpo) (Implantation usually occurs about 7-11 dpo.) Pregnancy tests are only reliable at 14 dpo but people here have had positives from 7 or 8 dpo with sensitive tests.

Good luck!