I hope you're feeling better and not worse. I must say, I've been sick more this winter than in YEARS, but I am working with little kids.
One thing I would NOT do ... if the house is cool and you feel too hot, I would NOT strip down and lie on the floor. When you feel too hot, it's usually best to get under the covers anyway, and sweat it out. That's what I have found. Not fun, and not comfortable, especially with an upset stomach.

But it usually works.
If it's a bug coming into the throat, I'd gargle with ACV if you can stomach it. Seems to kill whatever it touches, and that's a good way to head it off before you get it.
Early stage echinacea (purple coneflower) is good. It helps to lessen severity of symptoms and shorten duration. It also seems to prevent some illnesses, but it's really not good to take it long-term as a preventative. If you've already been sick more than 3 days or so at any time, I wouldn't bother with it, it's too late. The best echinacea herb is from various parts (root, aerial parts, etc) of more than one species.
Even better I'd say is vitamin C. If you can get a good source, even better. I usually take 1,000 mg. about every 3-ish hours. Your body can't utilize more than about 1,000 mg and it will just flush out, but a few hours later it can take more. That is probably the single best treatment for colds I know.
Ginger is my choice for upset stomach. Probiotics are also helpful for the stomach and general sickness. I think a lot of what affects the body actually happens in the gut.
For colds, so many things are good. Sometimes I find one thing works where another doesn't. Some of my favorites are garlic oil, oregano oil, and grapefruit seed extract (I use it rarely but it knocked out one that had hung on forever and was resistant to everything else).
Elderberry can be good, and cherry bark is good for coughs. For congestion in the lungs, I usually use a combination of boneset, fennel seed, fenugreek, horseradish, and mullein. At times I have used marshmallow (the herb, not the candy).

But raw honey is helpful to soothe the throat and help fight infection.
I second the eucalpytus-type salve on the chest, back, etc. You can also steam it in a machine or just boil a bit in water and inhale the steam (have to be careful with the heat not to burn yourself).
Get plenty of rest, and chicken soup (especially REAL chicken soup) is good ... any hot liquids can help too. Keep warm, drink lots. A good multi-vitamin/multi-mineral isn't a bad idea either, just so your body has what it needs.
And if your lungs get really bad, you may want to go to a doc. Antibiotics won't help a viral infection, which colds/flu will be, but if you develop a secondary bacterial infection they are usually needed. I finally fought off the one I had years ago that hung on for months, but it ended up changing my voice.
Oh, and I'm not saying you need ALL this stuff.

Generally I up the vitamin C with a little echinacea early-stage, get extra rest and fluids and keep warm, and that's often all I do. If it gets worse, I use whatever of the others I think I need. Just listed it all in case you have some handy and not others.
Hope you feel better!!!