Spicy up sex life

I’ve been having low libido for a while now, random urges but I’m mostly not interested in sex. Recently my sex drive increased a bit. Now I’m at the point where my mind thinks have sex but my body is like nahh. I’m confused. I feel so uninterested in sex that my partner is getting bothered by it and even thought I may have been cheating. I think our sex life is just kinda like quick and boring to me. We have a toddler, who sleeps in our bed. Stays up late so by the time we get her sleep we’re ready to sleep. We weren’t always like this and I don’t wanna lose our intimacy. Help.