[29M) My deviated septum is causing me severe difficulty breathing and is making me borderline dysfunctional, am I in danger?

I am 29 year old Caucasian male, 187cm tall and weight roughly 88 kg. I do not smoke, though I do drink most weekends. I've had some problems breathing through my nose for years, but in the past it wasn't so serious. That changed recently. Some months ago a doctor suggested that I probably have a deviated septum (before that I thought I might have asthma, but that doesn't seem to be the case. Inhalers don't really do anything for me). While somewhat annoying I did not feel that the breathing difficulties were bad enough to warrant any immediate concern.

That all changed recently.

Some time ago, I started having episodes of troubled breathing. Typically these would only happen in the evening, while during daytime I wast typically fine. But as of recently, I've been finding it difficult to breath even during daytime. It started with only some minor episodes during the day, until as of recently I have almost constant difficulty breathing, with nighttime being the worst.

We are not talking superficial breathing difficulties, but actual legit feelings that you are almost suffocating. It can get so bad that I will feel dizzy and cannot focus properly on anything I'm doing. At one point in time I decided to lay down and listen to an audio book in an attempt to relax and I wasn't able to do even that because the problem breathing made it too difficult to pay attention to what the narrator was saying. In some cases I also seem to suffer mini-short term memory loss. Hand movement also feels less precise because of difficulty concentrating. Basically I become almost completely dysfunctional during the worst episodes. Even now as I type this I feel lightheaded and cannot really focus properly.

I can't help but feel a bit scared. I know that trouble breathing when you have a deviated septum is common, but is it common for it to actually be this bad? The idea of living this way forever sounds nightmarish to me. It would literally destroy my life if this isn't fixed.