For the past 4 months I have been suffering from a chronic cough and I am really worried that Incould have lung cancer. The cough started off chesty with lots of thick green mucus (with one occasion months ago containing a slight amount of blood but I didn't think much of it.) Now my cough seems to be more dry with thin mucus as I make my way I to the summer months. Also my cough now seems to be worse during mourning and evening tims and I feel slight chest pains now and again although it doesn't really prevent me from doing daily activities. I have been to the doctors already a couple of months ago and they said everything was alright from my oxygen levels and stuff. 
 

I am just still worried that something like lung cancer could be progressing inside of me and being at 4 months of having it I worry I might have left it too late. It is often my mind that makes me think I have something like Cancer yet still it is worrying to have these symptoms. Also it's hard to see a GP again due to COVID-19 so don't know what to do... 

Im 18 btw.