J.M.
I am with the other mamas take your time whether she sleeps or not. In our house we had rest time through this summer (mine are 4 and 5). When they were little I needed the break and now that they are older - when they are together all day they need the break from each other. Also my daughter quit naps for a couple of months around the same age, but I just kept being consistent in the rest time and she started taking them again. Over the summer sometimes she would fall asleep and sometimes she wouldn't, but it started to interfere with bed time so I stopped when school started.
And, quite frankly, I always felt a little frazzled when they were that little. I was suprised how my demeanor and the way I felt changed after having the second. I was always the calm one before. As they get older I do feel more and more like me and not some overwhelmed, underequipt mom. Just
hang in there and try to roll with the punches. Humor - laughing at and enjoying their silliness and laughing at myself helps. I get in trouble when I start to take things too seriously.