Lab work question. Unhelpful OB. 🤬

Anybody know what this means? I know I’m RH - & already had the rhogam shot at 8 weeks. Will probably have again at 20 weeks since it should be every 12. Just seeing this antibody thing say positive freaks me out. I’ve already reached out to my OB just waiting to hear back. He said he’s “not concerned” but I need to know more. He’s not concerned about a lot of things which is why I’m switching to a midwife anyways. I’ve googled with no clear answer. Just wondering if I’m lucky enough to run across anyone who may know what this means.

It’s says “Antibody screen, rbc w/refl id, titer and ag”. My result was positive