Implantation?

Kaelyn • Mommy to Harmon Joseph Wood 7/14/19

My lmp was on 3/29. I got bad cramps on 4/22 and had positive ovulation test on 21st. Then on 5/1 I had a really sharp pain in my uterus, I was really moody all day, had a migraine, cramping, sore nipples, fatigue, and random knee pain. The first response 6 days sooner test was negative this morning with my first pee. Could it have been implantation on 5/1? and when should I take another test?