I just logged on,and where it usually says play your country said create a country.I already made it pretty far,and now its resetting on me?Why is this?

Earth games only have a finite length of time. Primary (which I think you are referring to) resets every 2 months. After that 2 months is up, you have a chance to beat your previous networth etc etc. It also means you can improve and try different strategies each reset.

That explains a lot,thanks londwell.

You can see the start and end dates on the portal page:

Primary
Jul 4 00:00 - Sep 1 23:59