J.H.
I can tell you,you are not alone.. Most women go through this. Talk to your dr. Its not uncommon. Make sure also that you are setting the moods.. Do whatever it takes to feel like a woman once baby girl is alseep. Long baths with bubbles. Mood music. Wine if you drink, candles. Try to get in the mood.
And remember to its not always about Sex. Its about the emotions behind it all... I hope that helps. good luck.