Gee, I'm 72 and a cancer survivor. I didn't 'lay in bed, I kept going though it was difficult at times, especially doing chemo and wearing a chemo pump while doing my chores. My wife runs all the equipment and helps with repairs as well. Being a female isn't a disadvantage far as I'm concerned. I used to run around shirtless, not any more. I look like a field dressed deer. but It hasn't stopped me. It has slowed me down a bit but that is it.
Laying in bed is the worst thing you can do with cancer. You need to keep on keeping on or it will kill you.
Something is blocking the fuel flow, probably debris in the fuel tank and the only way to remove it is either drain the fuel tank and clean it out or have a dealer do it if you feel you are not able to do it.