Is 10dpo to early ??

Brittany • Mother to my little man . Wife to his wonderful daddy . 19 .
Last night I had what I thought was implantation bleeding at 9dpo . I took a test this morning on a dollar test and it was negative . I don't even have the energy to get off the couch today . I'm still having mild cramps but it's in my side . Is 10dpo to early , when should I retest ??