Low sex drive

So me and my fiancé used to be like rabbits once we had our daughter things obviously slowed down but so did my sex drive he's always up for it whenever wherever and I find myself always having to get in the mood any tips or suggestions our daughter is now 3 we currently live in a two bedroom house with my dad so sometimes mentally I'm already turned off our daughter sleeps with us and my fathers room is next to us
I can hear him coughing at night and it throws me off we barely get time off or babysitting to just be with each other we still try to have sex frequently but some weeks it's 3 times a week and others it's once what can I do to get my mojo flowing again?