Retake Help?

Hey all, I was scoring higher on PTs but got a 154 on the august. I'm thinking of retaking just for a chance for some better scholarship money from my schools. I know I'm ok with my 154 but I want that extra chance. I am thinking of registering for November and then scores release on Nov 24th. Is this a decent amount of time to rack up a few points more hopefully and apply? Do I need to cancel my August score (I got score preview) or just do a retake? I'm assuming I just sign up for another one to retake and the other score will be available on apps.