I got a cold about a month ago, maybe just over a month, and it almost went away then came back and it seems more so in my chest now. It feels like it is full of mucous which I can not seem to cough up. My nose is still runny/stuffy and I have a bad cough again that started the other day. I have never been sick this long! Is it normal for a cold to last this long and get worse instead of better?