Sleep

Why can I sleep sometimes wothout problems and other times it does not come? Lately when I get home from work in the morning no matter what I do I can't sleep. I have tried all the usual- a protein snack, a soak in the tub, white noise, et cetera. I have not resorted to melatonin or benadryl yet but I am almost there. Usually around 11 am I can suddenly start to drift off. I don't know if it is because it is getting closer to spring or what.I haved learned to amuse myself by playing animal sounds on the computer which has caused the cats to try to find the animal hidden behind the speakers. It really is quite funny. When I played the barking dog both of them fluffed to twice their size and started to growl. It might be funnier to the sleep deprieved.