Feeling horrible at 38 weeks

I'm not sure what my symptoms are really but I just feel UGH. "Off" somehow, I guess. I almost feel the way I did after getting a shot or like I'm having a side effect from a medicine or something. (Haven't actually taken anything or had a shot in weeks). My chest feels very tight and full and I'm a little dizzy and nauseous. I feel a little carsick without even being in a car. My head doesn't hurt really but it just feels stuffy and annoying. My stomach feels a little upset and I am very gassy. 😩 Does anyone else feel this way around 38 weeks?