3 Whole Nights I've

Can you help me find the lyrics to a song I sang we sang in our music class about 50 (or more) years ago? I can remember some of the lyrics, but not all. It starts out,
"Three whole nights I've lain awake,
cock-a-doodle-do
for my little rooster's sake,
cock a doodle do
(I cant't remember this line)
And I thought my heart would break"

He had feathers blue and bright
cock a doodle do.....That's all I can remember.
Thanks for your effort!
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