Back again

How do you turn your husband on? I'm 4 months pregnant and I'm in cosmetology school all day and on my feet and I drive an hour home everyday. So by the time I get home I'm exhausted. I think my husband would kinda of be like she had a hard day let me at least satisfy her sexually. I told him many times I want it more, I try and surprise him with it. But once he finally comes my way I'm sleep, and I give hints. Idk what else to do. Where do you find the energy? How do you feel sexy and pregnant?