I forget I say or do things instantly like I'm on auto pilot.?!

I forget I say or do things instantly like I'm on auto pilot.?

eg. I'll reply to an email with a few sentances, and once it's sent not remember what it said. Or I'll be talking with someone, and say something then a few minutes say it again because I didn't remember actually saying it the first time, only thinking of saying it. It's happening more and more often. I'll listen to things, but instantly forget what was said. It's getting so bad, I'm getting phone numbers and names wrong at work. I'm young. What could it be? What is happening to me? What can I do to improve it? Is it just poor concentration and so my short term memory isn't recording it?

Woah, see a doctor immediately. Write stuff down the second you need to remember something. Ask some of your friends to help you out and remember stuff too.