Should I be concerned?

I have PCOS so did a dating scan early on in case I was further along, turns out I was 4w6d based on gestational sac measurement.

I wanted to do another scan at 6w at one of those private ultrasound centers to see if there was any changes, as I’ve been cramping a lot (no bleeding.)

I went and she said my gestational sac was measuring at 6w2d but she couldn’t see anything. They only do abdominal ultrasounds at this place but now I’m freaking out because someone told me they should be able to see heart beat and fetal pole even abdominally.

I wasn’t worried initially thinking maybe it’s just harder because my uterus is tilted but this person has me worried now. Do I need to get a transvaginal? I don’t know if I can just wait another two weeks for my regular OB appointment without panicking constantly..

What should I do? Am I overthinking?