Frustrated

Both my husband and I are trying for our first child and have been doing iui. I had a miscarriage last year. We are both 39. It makes me feel sad because we never have sex he's on blood pressure medicine and whenever we did try he could never get an erection now I've given up. I want to cry though because we were putting a fitness machine together and he was like maybe we should put oil on it and stupid me was trying to be funny and I was like maybe I should put oil on you but in return he was like I can never find the hole to stick it in...I want to cry cuz I can't stop thinking about it. I'm tired of doing fertility treatment but I have no choice since we aren't trying naturally. Am I over reacting about his comment.