implantation bleeding?

Tommie

so my hubby and i BD 3 times during my fertile week. i didnt use ovulation tests so im not exactly sure when i ovulated. my last day of the fertile week (Tuesday)we BD and then on Wednesday i was cramping on my right side and had this

it continued to Thursday but i havent had anything today. and my cramping only lasted for a day. could it be implantation bleeding? or is it just from BDing?