My husband hasn't been feeling good/right for a month or more now. He's extremely tired, achy and…

My husband hasn't been feeling good/right for a month or more now. He's extremely tired, achy and sore, sick feeling, stomach issues, nauseated and etc. He works a very physically demanding construction job where he lifts super heavy materials all day and busts his butt from 7 AM till 5 PM. He is very stubborn, won't go get looked at, and I am worrying myself sick over his health. This morning, he said, "I wonder if I feel this way because of you" (meaning, the pregnancy). It was like a lightbulb went off for me. I think its very possible! Does anyone else's husband feel sick or symptomatic at all? I have heard about this happening but I have never experienced it before! Interesting...