Definitely speak to the midwife, I get this due to anaemia so it could be that as it’s pretty common
I went to triage with the similar breathlessness & tight chest but throughout the day. They did bloods & and ecg. It came down to low iron (anaemia) as well. I have a midwife appointment tomorrow where she will talk me through iron tablets
Definitely speak to your GP or maternity triage. I’ve had breathlessness on minimal exertion and if reclined even slightly on my back (not just if flat). Ok lying on my side though. My GP sorted bloods and I’m anaemic, and I went through everything again at triage over the weekend when I went in with reduced movements. They’re concerned about that “suffocating” feeling so I’ve got a 24hr ECG & heart ultrasound next week 😳 Could just be pregnancy being a pain but I’m glad they’re being thorough xx