Dizzy, doctors aren’t concerned...

I’ve been having dizzy spells for 2 weeks now. I had my first OB appt a few days after it started (10 weeks,twins) and was told it wasn’t related to pregnancy and I should see my family doctor. I did. She flushed my ears out and gave me a nasal spray. It didn’t do anything. Wtf? I wonder if I’m anemic and if so should I be concerned? I don’t want to take an iron supplement if I don’t need to be taking it. I go back to the OB Wednesday. Do you think it’s safe to wait until then?