I've had a bad cough for about a month which has gradually been improving and isn't too bad now, but I'm now coughing up lots of phlegm. It's thick and green/yellow in colour. It feels like it's coming from just above my throat, between my throat and nose, if that makes sense. It seems to build up and then travel down a bit and I'll then bring up a large amount of phlegm. I'm anxious about my health and I'm undergoing treatment for my anxiety so I'm hoping someone in the know will tell me this is normal so I don't waste any more of my GPs time.