I took the macbook to a repair place that was not an apple store but did repairs on macs. They said it was the power button itself actually. They had to replace the keyboard though. It works totally fine now and they guaranteed it for a year. It was a quick repair. SADLY it cost around $400. Interestingly the repair person cautioned me to be careful of heat, to use the machine on solid surfaces and not let it overheat.
Just FYI, when the lap top was BRAND NEW it had a funky keyboard problem, when you hit a button it would do other things.. so they replaced the keyboard for free, it was only a few weeks old then. Now when this problem cropped up I took it back to apple since it had been less than a year since that replacement. They claimed the laptop had water damage based on some kind of funky stupid sticker, the kind they stick in cell phones. There was never any water spills on the laptop. I'm a grown person, if I had spilled something on it I would have suspected that caused the problem 🙂 Since when did THAT start...seemed really really like scam to me. So...I think I got a lemon from the start. This is second keyboard in less than a year. But, it was really the powerbutton.