Last week I played Monday, Wednesday, and Thursday. I play $2-5. I've noticed that my best sessions have been between 4-6 hours in length so I usually don't play too much longer than that unless I'm running hot or there is a spot on the table who is deep.
Did you drive home after that session? I'd be friggin exhausted. I've actually hallucinated from sleep deprivation on more than one account on that drive back.