Hi I've recently turned 20 and I think I have cancer this may sound stupid but I don't know who to talk to anymore I've got a lump on the right side of my head, swelling on my neck, a lump on my thyroid, pain down my arms I'm extremely tired all the time but I can never sleep, my skin on my face has gone yellow and my feet and lower legs are yellow  and pale, I keep getting zaps in my head and weird headaches/sensations, one of my testicles has gotten x2 the size in the past 2 months. I'm losing control of my bowel and barely making it to the toilet which produces quite a lot of blood usually I'm getting pain in my bones and joints especially knees and collarbones, I can barely get out of bed most days. My gp is absolutely useless and I can't even get an appointment to see him. Due to this illness I've lost my job so I haven't got funds to see a private gp(I don't have much family to ask) every time I speak to 111 they refer me to my doctor even though I'm pleading with them he won't do anything and asking for an out of hours gp . I've been asking for an mri scan for the past 3/4 months with no luck. I really feel like I'm dying and no one is doing anything to help and I  really don't know what to do anymore I'm scared to die in pain which is making me think of alternatives instead of being in this constant pain and I have no one to turn to I'm feeling weaker and weaker everyday and I feel my body is giving up slowly and I really don't know what to do I'm just scared/fed up I know cancer at 20 probably sounds stupid but the symptoms seem to match up any advice would be appreciated thanks

could the doctor just not want to tell me I'm dying?