Possibly Bad OAT scores, should I report to school?

Hi,

I am taking my VERY FIRST OAT in 2 days.
I really don't feel I am ready but I scheduled it so I can meet the deadlines for some schools.

IF,I do really terribly on the OAT this time, should I still send the scores to the schools?I am talking about less than 50 percentiles in most subjects...
Or should I send them my better, newer scores in March?

Thank you!