So I have a flu and am suffering some sinus issues, and that lead to Headache! Any remedy out there!?

My husband swears by this. He uses it every night.

https://www.vicks.co.uk/products/decongestants/vicks-vaporub-ointment

I drink hot water with lemon and honey when I have a cold or flu. Drink regularly throughout the day.

Honey is my go to as well. It's very good for colds (and many other things). I try to buy local honey. It might cost more than shop bought but worth it. Also Manuka Honey - which you can buy in supermarkets.

There's a point, when you have a cold/flu that your best option is to rest and let your body start to recover.

Wrap up warm. I don't like heating too hot but keep your body well wrapped up and snug.

When you feel a bit better, take a walk and get some fresh air.

Soup is what you eat when you feel poorly! When Chris and I had a flu bug recently, we ate very little for a couple of weeks - just toast, really. I was fed up with toast so got a bag of frozen veg out of the freezer and concocted some soup. It helped.