im really feeling for you at this time
i know exactly how you feel when you say your husband keeps telling you to eat, he loves you but doesnt understand the pain you are in. However the advice here is right. Get the PEG it will make you feel a bit better and it will stop the "nagging" from those around you to keep eating! I didnt have a PEG but i did have an "NG" tube which is pushed up your nose and down to your stomach, it looks awful but it saved my life, no exaggerating. I didnt want it and fought it for as long as i could, pretending that "i'd be ok" it was just my pride talking. I thought i could fight it all on my own, but it's nothing to be ashamed of and it really helped me phsically and mentally! I ended up with it in for a couple of months and was quite sad to see it go! I worried about what people thought about it seeing this yellow tube hanging out of my nose but you get on with it and actually nobody minds at all! I even went to a wedding with it in!
Whether it is a PEG or an NG my advice would be to get something sooner rather than later. I actually told my hospital they should put PEGs or NGs in everyone before they start treatment as a precaution iam so in favour of them! By the time i decided i needed to have one i was really too weak and was not really in a fit state to know what i was doing. Dont leave it any longer, it will help you. You have enough to cope with, without worrying about how much you can eat. good luck you are doing great.