The log will continue to grow until a truncate is issued, at which point the space within the file will be available for reuse.

You say the DB's in full recovery for point in time recovery, but if you don't have log backups, there's no way that you're going to be able to do a point-in-time recovery. Either switch to simple recovery or schedule log backups.

See - http://sqlinthewild.co.za/index.php/2008/07/23/recovery-model-and-transaction-logs/