Implantation cramps/bleeding vs pms cramps/bleeding

Da
Hi ladies, I have a question. We've been ttc since January, I've been on clomid since February and I got my first positive ovulation test this month. My tww has ended and I should've gotten af today. I haven't had any cramping aside from some sharp pain- almost like ovulation - and a little staining but no actual blood.. Has this happened to anyone and when should I take a HPT? Praying that were pregnant!! TIA!