Lots of water and sinus rinses. Soup. Rest. Repeat.

I like Lemsip. It’s basically paracetamol like you already use but contains pseudoephidrine as well as an “upper”.

For a cold?

Soup, spicy food, hot drinks, salt water gargle, and sometimes I'll use OTC cold medicine (but be careful because they usually have tylenol in them so you don't want to drink or take other medicines that can fuck up your liver).

I swear that high dose vitamin D helps me when I have a viral infection, but only if I start taking it early on. Tylenol for fever, maybe also ibuprofen if there are a lot of aches and pains.

Feel better soon, OP!

Sudafed typically gets me the best results when I have the flu

If you're congested, put 12 drops of the spiciest hot sauce you can get in a small cup of water and gargle it and swish it around like mouthwash.

You won't enjoy it, but you will be able to breathe.

Whole chicken broth with tons of legumes. This shit works miracles

Just as a note, if you're not sure if you have COVID or not, avoid ibuprofen as it can make some COVID symptoms worse

Good luck!

Opioids always make me feel better. Methadone is slow onset, long duration, ideal for getting over the worst. Tramadol is cheap and plentiful. They are addictive so don't take them for more than a day or two.