rhogam shot

I was given a shot of rhogam two days before my miscarriage. I had an ultrasound and found out my pregnancy wasn't viable and then naturally started bleeding two days later. I didn't get a shot after. This was in august. I'm currently 6 weeks pregnant again and so scared that I'm going to miscarry again or that they gave me the shot at the wrong time. Is it okay that I had it before I even started bleeding???