Do you have a monitor? I don't use one for Alex now, but she calls out sometimes and, like Layla, unless it turns to a full blown cry then I don't go in. I also hear her cry and I sometimes go in quietly, have a look and listen and she will actually be crying in her sleep (probably a dream)
I have been listening to these cries for ages now and I have learned to work them out. I can actually listen from my bed and know whether it is blankets off, can't find her sippy etc. It takes a little practice, but have a listen first. rushing in could be doing more harm.