Hi! I am Justin. Please give me a few minutes to go over your question.
Did you already restart the computer?
It sounds like your operating system may be corrupt. I would suggest a reinstall of the operating system. You can do this from the recovery partition and it should not write over any of your current data. It will fix the issue. This the information I have to resolve this: https://support.apple.com/en-us/HT201314