Persistent sore throat progressing downwards. Starting to be scared

Age: 21 Sex: Female Height: 1.60m Weight: 50kg Race: white Duration of complaint: 3 days Location : throat Not a smoker Posting on behalf of my girlfriend Like it says in the title I'm getting concerned somethings wrong with my girlfriend. On Friday she woke up in the middle of the night with a sore throat, she didn't think much of it and it wasn't too bad. During the day it got worse and at night it got really bad, like to the point where she couldn't sleep. And yesterday it stayed pretty much the same throughout the day, she says it just hurts consistently. During the first day she took some lozenges and drank some hot milk with honey and it helped but now that doesn't help anymore, neither does ibuprofen. Today she woke up and still feels this way and now she says it hurts a bit lower down too so it's progressing downward which is scaring me. Also she mentioned that one of her nostrils was blocked during the night which made it harder to breathe and she says she has a headache. Before the sore throat started she complained about really bothersome lower back pain and bloating but those have since passed but she is still gassy and is burping very often even if she doesn't eat anything. Here's a picture for reference: https://imgur.com/a/SURaZ0s She says it started on the area with the blue circle and today it hurts further down, in the area circled red. So in recap: Sore throat persisting for 3 days progressing downward, not alleviated by lozenges, warm drinks or ibuprofen Headache Blocked nostril (during the night, it has since passed) Phlegm on her throat Gassy and burping very regularly (might be unrelated idk??) Things she DOES NOT have are: Swollen lymph nodes Fever Rash Cough Chest pain Hoarseness So can anyone give us a clue as to what's going on? Could this be something serious? We can only go to the doctors tomorrow so for now this is the best bet.

i am not sure but it might be silent reflux…its a guess and i am not a doctor…go to some ENT