i remeber what u r going through
when i started racing it was the same go to a big race then the club meets wont feel that big.
i was told this a thousand times at least run your own race don't try and compete especially in the heats. some one is faster than u dont try stop them going through. usually there better than u so just move out of the way because the guy has more know how he will move u if u dont move for him.
have fun