Unisom & B6 Question

For those of you that took/take Unisom & B6 for nausea, did it or does it cause you burning in your chest when you breathe in deep? When I take a deep breath in, I can feel it burn in my throat & I start coughing immediately. It’s worse overnight & in the morning.

*Side note: I also have a sinus infection (hacking up green mucus) and have just been tested for COVID & it’s negative. I’m just not sure if it’s my sinus infection causing the burning sensation when I breathe in cuz that’s never happened to me before and I get them a lot or the unisom is giving me weird side affects!