Is it supposed to feel like work?

My husband and I are two months in to seriously trying to conceive. Previously we had just been having unprotected sex whenever. We both lead busy lives and my husband works a lot - like 12 hour days! We usually had sex 3x a month. Now that we’re officially TTC I’m exhausted just thinking about sex sometimes. Is this normal? The idea of having sex 7 days in a row seems exciting at first and then when we’re on day 4 I’m already over it. I can also tell he’s not as into it. He’s been really supportive and we’ve just categorized it as “business” sex but some part of me feels like it should be more romantic or something lol. I’m also newly married if that helps provide context!