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Jan 13, 2016 7:40 AM in response to Hannahrae24by Jason L,Hey Hannahrae24,
Welcome to Apple Support Communities.
It sounds like your MacBook Pro isn't starting up normally, OS X isn't starting up normally anymore because a prohibitory symbol is displayed. If you haven't already, try reinstalling OS X as described in the article below.
About the screens you see when your Mac starts up - Apple Support
Prohibitory symbol
When you see a circle with a slash symbol instead of the Apple logo, it means your Mac couldn't find a valid System Folder to start up from.
If you're using your Mac at a school or business, it might be trying to start from the wrong version of OS X. Contact your IT department for more help.
If this is your personal Mac, try reinstalling OS X by using OS X Recovery.
Take care.
