24 weeks pregnant...

Hey girlies! So i am almost 24 weeks pregnant and for a while i've been feeling a little bit short of breath and having stretching sensations on my stomach, which is expected but when i sit up from laying down or change position suddenly i get a little short of breath. it's not too bad to the point i'm struggling to breathe. i also have been getting crazy hot flashes! my stomach just feels sooo full and my baby girl is super active so my stomach muscles feel really sore all the time :/ sometimes if i'm sitting down hunched over, or laying down on my side i'll feel a little short of breath. i was wondering if this happens to anyone else. i've been tested for COVID many times and it's came back negative.