Sex life dead after baby...HELP!!

I gave birth almost 4 months ago, and my husbamd and i have only have sex as many times as i can count on my fingers. It currently has been 3 weeks without intimacy. Something always happens to where we end up not doing it. Someone from his work is always calling or texting him (he is military, so he has to answer the phone), or the baby ends up crying,he is too tired from work, or ect ect. I tell him to just put the baby in her bed amd let her cry for a little bit, so we could have much needed us time for a change. He wont do it. He says he doesnt want to listen to her cry. I just want to have sex with my husbamd again. How do i make this happen??!!

Also, we have 0 friends or family here. We live 11 hours away from any family simce my husband is military. So we have no one to watch her. I refuse to trust someone else in our home with our baby when we arent home. The people around here are very shady people sadly😩.