Am I right to be upset or are the pregnancy hormones making me emotional?

This is long:

So I have a 12 year old black lab that I’ve had since I was 15. When I got him I was going through a super rough time as I’d recently moved in with my mom after suffering abuse from my father. My mom thought the dog would be good for me. I became very attached to him and spent many nights crying and holding him. Suffice it to say he’s very important to me.

He’s old now and he has some bladder issues. I try to take him out often to mediate that but he still has accidents. I’ve been wanting a fence built since my husband doesn’t help take him out. I paid for all of the stuff and a year later all that’s done on the fence still are the poles being in the ground. (My husband has a history of being lazy when it comes to projects).

Tonight even after taking my dog out twice within a half hour, he ended up having another accident while we were sitting down to eat dinner. I took him out and cleaned it up then sat back to eat. I mentioned maybe I’d just get hardware cloth to put around the poles so my dog can go out more often and maybe have less accidents.

My husband responds “or we can just have him put down”. That really upset me and I said “I don’t think that’s the logical solution here”

He then says “well I think it is. How long do you really think he has left anyways?”

I ended up throwing out my dinner and going somewhere else because I was choking up and crying.

He knows how I feel about my dog. And I know he’s old and is going to die someday, but to say we should kill him just because he’s too lazy to help is ridiculous and upsetting to me.

So am I just being emotional or was that wrong of him to say. He gave me a very gaslighting apology later on but I just don’t want to talk to him right now.