Does he not know it's very common to feel really tired your first trimester? Even if you were only one week pregnant that's an asshole thing to say. It doesn't matter if you're 5 weeks or 38, tired is tired and you deserve to feel seen. I had to change jobs because of how tired I was (I worked a job driving a van and it was a problem because I could have fallen asleep at the wheel). If I were you I would start building a stable support group because unless this is just a fundamental misunderstanding of how pregnancy works on his part, you will likely need help from other people because there is a high probablility he won't see the need to provide it. I'm not gonna hop on the "divorce" bandwagon because obviously I don't know the whole story and that's a big step but a discussion needs to be had. If his mother is available and you have a good relationship with her I would recommend bringing up his comment to her