I don't know what I have done but the size and font and everything on my laptop is wrong and has changed and I don't know how and why. I have turned it off and on again in the hope that it would sort itself out, but no.

HELP as I can't stand looking at this type face.. Its all stretched out..:-(

Have you tried going onto settings - Apearance and personalisation - font?
Just an idea.

The screen is all stretched, thats the problem it seems. ???

If you click "page" in the top corner,scroll to text size then click to change to what you need. You can also change the zoom level by clicking the magnifing glass at the bottom of the screen,just above the time and date. Hope that helps you.