You can take Paracetamol and Ibuprofen at the same time - timing it so you take them at the same time for the first dose in 24 hours helps maximise feeling less awful (it's usually Paracetamol every 6 hours and Ibuprofen every 8 in 24 hours). Do NOT use cold remedies at the same time. If you have painful sinuses/your face hurts, send somebody out to the chemist to get Sudafed on its own, not with any additional meds. It needs to be the Sudafed bought from the chemist from behind the counter, not the shit stuff that you can get in the supermarket or on the shelves.
Lots of fluid - if somebody is around, send them to get you full sugar lemonade, let it sit at room temperature (as ice cold can make you feel sick) and have tiny sips almost constantly.
Have cold packs and wet flannels to keep your temperature down (which reduces headache if you use them to 'chase' the pain around your head). Yes, you'll feel cold, at least when you aren't feeling like you're burning up.
If you feel well enough to consider a bit of food, a broth like soup (chicken stock cube and a handful of frozen veg) is a plan. A shower when you can walk and stand up will help - it's OK to have to sit on the shower floor.
If you need a hot drink, hot stock helps (the salt helps to prevent dehydration) and if you get more 'cold like' symptoms, add a bit of ginger and pepper. If you crave sugar, orange juice heated up with ginger and honey is more comforting than lemon and honey.
NO visiting newborns or pregnant ladies until you feel perfectly fit again - you wouldn't want either of them to have this. And use hand gel in any case.
Prop yourself up in bed to make it slightly easier to breathe at night. And if you start feeling it's hard to breathe whilst laying or sitting down, you need to call NHS Direct, as it's very easy for flu to end up as Pneumonia (and my God, that's a whole different ball game).
When you're better, you could still get the flu jab, as there is more than one variant knocking around at any one time. It's worth it, even if you need to pay - as you probably know right now.
Hope you feel better soon.