low/no drive

I have a 3 almost 4yr old, miscarried 2016, and tried again a few montgs later and now have a 6mth old. My "drive" is low to nonexistent. Not sure what to do, I'm often tired/feel worn out from the day-to-day. Hubby is patient about it but I dont want him to have to be; i'm attracted to him my lack of action doesnt translate that. Can anyone relate or can offer insight on how to get out this slump?