37+3 Pregnant and Can't Breathe! 😟

Last night was a nightmare..I don't think I slept an hour straight..it was a mix of pains.. discomfort and what not..which is all normal at this point..I mean there's just 17 days until my due date now. But O MY WORD..I thought the breathing was supposed to get better once baby dropped..mine has gotten increasingly worse over the night and into the morning..it's making me shaky and weak in my legs. It's a weird feeling in my chest..like it's racing but not really..it's so hard to describe. It's different than heart palpitations which I have experienced the last couple weeks..should I be concerned? Anyone else feel the same way? Thanks in advance