Any computer expert here could help me out please?

[Marie loves PSB]

Hello! I have really done something silly to my P.C. I went to click on a "new tab" to look on the internet whilst e-mailing. As I always do. I somehow missed clicking the tab and now I have got two inches of screen at the top of my internet searching screen missing and now a tab that sticks out at the top left with whatever site I am looking at. I cannot get the page back to normal through minimising etc.. makes it worse. I have tried making the page bigger to get rid of it and it will not do it. And if I click the top left tab it deletes all the page - it is like it belongs to it. I have searched for this on the internet but cannot find it at the mo. Restarting P.C has done nothing.

[Marie loves PSB]

Please don't worry I have just managed to sort it out! There is an upwards arrow that suddenly appeared. *I need to sit down in a dark room now*. Thank you for reading.