Is it normal??

Mary
FTM and first ever pregnancy so I'm still not sure what's normal and what isn't. I'm fixing to be 17 weeks and the last 2-3 days I've been getting very very short of breath. I feel like I need to gasp to get air. It also is accompanied by serious light headed/fuzziness and if I don't sit or lay down I'm positive I will fall over. Anyone else?