are you wokring with a pattern? If so there probably is some thought behind everything and there should be enough stitches. So follow Merigold's advice first of all.
If your pattern does decrease or increase there might be that amount of stitches more or less. Then there should be a solution how to finish the round.
Can you link to that pattern? Maybe we can figure it out for you?
Continental Knitter with passion, pretty busy and always onto something new.
I have been away from the forum for a bit, but I am still around!