Ahh we've all done it, I'm sure.
In further answer to your original question T, sometimes I will go out for the day specifically for photography and my camera doesn't come out of the bag.
I don't worry about it, it is good once in a while to just sit and look.
Something will come along or I will see something eventually that I will photograph.
Since taking up photography a good few years ago, I find myself constantly looking now for photo opportunities. When I don't have a camera with me, I make a mental note to return another day to capture whatever it is I have seen.
Even just seeing something which I won't necessarily see again, like specific cloud formations when I don't have a camera with me inspires me to keep looking, there is so much around us

Lacking mojo happens to us all but I am sure if you have lost yours it will return, it almost always does. Keep looking, keep dreaming