My computer is being really weird help!

sorry about the grammar being so bad in this question it has to do with the problems im having
ok so it started with the scroll thing on the mouse when you tried to scroll up and down it scrolled sideways
now if i have caps lock on its all lowercase and without caps lock on everything is uppercase
all the punctuation buttons when you try to type that symbol it acts like your holding down shift so thats why im not doing punctuation
holding shift doesnt help
when i try to push the over keys it highlights the text
and when i click a link it opens in a new window