Implantation cramps?

T

So I was on depo for 6 months and now I have been off for 7 months. The past two days whenever I wake up I have cramps that feel like period cramps but AF still hasn't came. The cramps are about 5-7 minutes long then stop and I feel normal again. My boobs have been sore for about a week and the last time I had unprotected sex was 11 days ago. I haven't tested because I feel that it would be too early