I am kinda weak, have low body temperature and congested nose (but recovering). What could I be suffering from?

If you don't have a thermometer problem, it could be the Swine Flu. There have been several people who have reported a low body temperature with it. I wouldn't be too concerned unless your temperature slipped below 95 degrees. At that point, it begins to get dangerous. 95 degrees and above is okay. I think it is your bodies way of fighting the virus and your temperature could go up above normal at any time while fighting the flu also. By the way, using a Neti Pot would really help your congested sinuses. And one rumor says putting some onion under your armpits raises your temperature but I don't know how true that is. LOL Personally, I'd just eat some spicy food... maybe some hot chili...