New here, any advice would help

Over the past couple of weeks I have had a bit of a cold, I have shaken most of that off now but still have a a very slight cough and need to blow my nose.

Over the past week or so I have had pain in almost all of my joints including my finger and toes and the right side of my neck feels tight and sore. 

I have previously had leukemia when I was little and have pretty bad health anxiety. I want to go to my GP or out of hours but feel I go for a lot of stuff. 

I'm pretty scared and just feel depressed with it