A.,
I didn't read all the responses, but wanted to let you know about my personal experience. I have a 2 1/2 year old, and 8 1/2 month old twins. First, you're currently pregnant, and need to cut yourself slack... everyone's pregnancies are different and it may be the furtherest thing from your mind, especially with how you're feeling (you're 39 weeks and doesn't sound like you've had a comfortable pregnancy at all...)
I would not expect anything to get back towards "normal" until around 6 months. It may happen sooner, but don't be surprised. I felt horrible as I have a wonderful, loving and very understanding husband, but despite extreme fatigue and exhaustion, I was desperate to start getting that back, for both our sakes. I contacted my OB after I found a friend was prescribed something to help get her hormones in check, and he wouldn't do it- said to give it more time. I was livid as I felt like it would never return on it's own, but it finally did. I can't say it's like it was before we had 3 children, but feel it's as normal as it can be. It does take some time for hormones to return to somewhat normal levels after a pregnancy... so in the meantime, just make sure to keep communication with your husband open, let him know what you're feeling and do whatever you can to give him his time (which can be hard with two young children, one a newborn)- but be sure to let him know you love and appreciate him. Don't give up hope!