Sex drive. In need of advice

So I’m 29 years old. I’ve had two baby’s age 2 and 10 months. I just wondering does anyone else’s sex drive goes down after a while. Like my partner is always down for having s*x but I’m not feeling it most day when it come down to doing the Deed loool 🙈🙈. What can I do to get into the mood for sex time.