Implantation bleeding?

Hannah

According to my app, my period is due in 3 days. 9 days ago, hubby and I didn’t use a condom when we had sex, and the other day (3 days ago) the condom broke during sex. Today I had a vaginal ultrasound because I applied to be an egg donor and there was no sign of a pregnancy, but I just got home (my ultrasound was at 1) and after having mild back and abdominal cramps for a few hours after the ultrasound, I’m having some light spotting, similar to what I’ve seen some women post as “implantation bleeding” on here. Could it be related to having an ultrasound today? Or my period in a couple days? I’ve never had premenstrual spotting, my period comes in heavy right away. Help!!