If you don't get an invite within 2 years then it will expire and then you will need to do a new one.
It may help you get a response if you tell us which states you selected for your EOI you lodged and the ANZSCO code you have applied under.
The only way really to know what states are accepting what points is by people with the same ANZSCO code saying how many points they had when they got their invite.
IF people keep applying for the same ANZSCO code as what you have nominated for with higher points then you may not receive an invite, it all depends on how many points others have and how many invites they have available. It is always advisable that the more points the better.