3rd Chemo and floored

Just had 3rd chemo and struggling. I appear to end up with excess mucus, this makes me gag and then I’m sick. I’m struggling to eat as I feel everything catches in my throat.

Not sure if the is due to larynx or the mass in my neck pressing on it. Scared to phone n muskrat incase I’m admitted. I feel so awful. I’m mouth washing with bicarbonate, sipping water. Tried flat Diet Coke everything tastes awful.  I’m so scared that this isn’t working and the cancer is getting worse(CUP).