I know this is going the opposite way...

I recently installed bootcamp on my MacBook and got Windows 10 running. Now when I try to boot into the MacOS, I get a " your computer restarted because of a problem, press any key or wait to continue starting up". I wait and it starts to load again but then the error message is repeated. Over and over and over. I downloaded bootcamp (again?) onto the windows side, but when I try to open it, I get the message "this application is not intended for this computer model" or something along those lines.. any help would be great...