Lack of intimacy

Lorie

So my husband and I have been together for 5 years and we have a 3 year old daughter. When we first met I was in the best shape of my life but after having my daughter and working in a bank I've.put on some weight.. my husband has been having some erectile issues that started just about a month ago. He can get hard but can't keep the erection long enough to actually have sex. I asked if it was me and he said no but that he's been feeling very different lately. He has gained some weight too and prostate cancer, heart disease, diabetes runs I'm his family. We've made an appt to see his doctor but I can't help but wonder if it is me or if there is something medically wrong. We are very open with each other but I can't bring myself to talk about how.much weight I've gained or to talk about how different body looks now. Am I overthinking this?