second trimester-no relief!!!

I just got 15 weeks today. Is anybody else still dealing with overwhelming fatigue and lack of sex drive? I eat healthy, exercise 6 days a week and drink tons of water. Despite this, I can't shake off this excessive tiredness. My husband also asks every day if we can have sex. I feel so bad bc I tell him maybe bc it truly is a maybe but later I feel so tired or grossed out by the thought of it the sex doesn't happen. Usually we have had sex every other day even in the first trimester but this week it's only been once. I also feel stressed when he asks me but I don't know how to tell him again without him feeling hurt or like he's being a bad husband. I thought all of this would get better the second trimester but it's just gotten worse.