HELP! Back pain!

[Tocldja]

For the last two weeks or so, I've been struggling with a minor cold. I've got the basics, runny nose and the occasional flemmy cough. But just recently, I've developed a sharp pain in the upper right quadrent of my back. I can't tell if it's from the cold or if it's gas because it sort of feels like having a hard swallow, or trapped air. Another thing that concerns me, is that I've had a bit of blood in the mucus from my nose every now and then. Does anyone know what this could be? Any help is greatly appreciated.

[Paxiled]

I've had bloody noses for years, that's just dryness and friction.  Nothing to worry about.  Don't know about the back pain, but it sounds like a strain that could even have happened with a particularly strong cough.