My screens rotatedby 90 degrees

Hi Rachael.

Depending on your graphics hardware, looking in the tray for a Nvidia, Intel or Catalyst (AMD) icon right click it and select the appropriate rotation setting for your screen.

It's nothing serious at all.  

If you aren't sure what to do, I'm sure someone can elaborate on what I said.
Sorry I wasn't so detailed, I'm about to fall asleep.

Thank you so much for your time, i'll try that

Hi again.
Just adding if it's Nvidia, you may need to go to the control panel and look for the rotation settings in there, it should be in the "display" category.

Intel's display driver should be in the tray, right click the icon and choose the right rotation settings.

Catalyst (AMD) should work pretty much the same way as Intel's, right clicking the AMD/ATI/Catalyst icon and selecting the right rotation setting.

Hope this helps!