Thanks for your response - so I scaled it down to 1920 X 384 (384 came up automatically) but the logo is still just as small.
Why do I want it so big? So that the logo takes the width of the page. It was doing this at the end of April but not anymore 
So now I have huge gaps on the both sides of the logo and underneath. Previously I didn’t have this so I want to have it the way it was originally. I went on vacation and I don’t know what happened in the meantime…