Anyone else have symptoms with only mild anemia?

Beck
Last week I mentioned to my doctor that I've had a few episodes of shortness of breath/rapid heart rate. He referred me to a cardiologist which I think is unnecessary. This week I took the gestational diabetes test and discovered I'm slightly anemic. Is it possible I can feel anemia symptoms even though it's mild? I know anemia is common so I wanted to see what others have experienced. My doctors office has been less than helpful all the way around😒 
A little background, I'm a FTM and had a smooth pregnancy until two weeks ago (27 weeks pregnant at the time) when I experienced a minor placenta abruption and went into preterm labor so now I'm paranoid. 
Thanks for any insights!