Husband too busy to BD as per my schedule

I am unable to do BD as much as I want to because husband is so engrossed in work and at the end of the day he is just so tired to do anything even if he tries to. I am very frustrated and annoyed because I have put some of my plans on hold as we are TTC our child #2. We did on weekends but when the actual high fertile period came, we just ended up with a gap of 3 days in fertile period. Does anyone else have similar situation and how do you deal with it? I feel like I have to force myself onto him. He is also keen on having another child but why cant he just understand that some efforts are needed🥺

Before we started TTC baby #2, our sex life was almost none like maybe once in 2-3 months because he is too busy with work and is so tired after that.