Can’t catch breath

Sa

This is the second time I’m having the feeling like I can’t catch my breath. I’m just sitting on the couch. This happened yesterday for about 45 mins. I have a blood pressure cuff to use at home and it’s normal, but my pulse is elevated. Anyone else experiencing this, is it baby’s position? Im 27 weeks 5 days. I’m not gasping or anything but I feel like I just exercised when all I’ve done is eat breakfast