Congested Nose

I’m 36 weeks pregnant and I’m going to the doctors in the morning for my check up but I wanted to see if anyone here knew about this...

I have has my nose congested for about 4 weeks now. I had a cold for 2 weeks but it’s gone and my nose is still congested. I sometimes feel as if I don’t get enough air has this happen to anyone else?? If so does anyone know why this happens or a remedy?