Second ovulation? Implantation?

Toni

Hi ladies! So I have been noticing I have been having these cramps the last few days. At first I thought it was just my muscles getting used to me working out again but they have been feeling like the same pains I have when I am ovulating. I have this calendar from a website called baby med and according to it if there is a fertilized egg it will implantation tomorrow or three days after. Could that be it or is there such a thing as second ovulation? Or am I too baby crazy lol