Your story is very similar to my own in the following respects: high achiever at school, procrastinator, using skills and brains to put in work that is acceptable in less time, rather than superlative in the full time, self damaging behaviours that you try to end.
The odd sleep patterns read familiarly too, and in many cases point to depression or stress.
I would ask, do you have familial or professional stress?
Please remember that depression is not a matter of "being upset" you can have depression and be happy in aspects of your life. Depression is a matter of having an emotional response that is not in line with inputs (in many cases).
I think it would be a good idea for you to talk to a professional counsellor, or your family doctor (maybe even print this out to read as crib notes).
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Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
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