keyboard typing on its own

My computer keeps typing the same random characters on its ownp0[;'/

While I type it might begin to do itp0[;'/p0[;'/

Those above characters are an example of what I'm talking about - its been getting progressively worse.

I do not use a wireless keyboard and nothing is pressing those keys.

It does it pretty aggressively and sometimes won't even let me backspace because its p0[;'/ typing on its own.

HELP!