Hey girls. I don't know if this is the flu or a cold, but I have a strong…

Hey girls. I don't know if this is the flu or a cold, but I have a strong headache and a stuffy nose, my eyelids feel heavy and I can't even sleep — the headache is really awful. But I don't have a fever. When I lie down my nose is blocked, when I stand up it clears. I'm rinsing my throat and nose with saline and a baking-soda solution. I'm drinking tea with lemon, honey and ginger, and also separately with raspberries. But it's getting worse and worse. What can I do? How can I ease the condition?