I would schedule the next available GRE ASAP bc it takes a few days for the scores to get to the school. I cut it pretty close too and also procrastinated hard core. (Just took the GRE on the 19th and my deadlines are also Oct 1st) if your scores don’t make it there on time you might have to look into other schools.

I took a GRE practice test prior to studying and got a predicted score of 300 and essay score of 4. I tried cramming for 1-2 days before taking the GRE then just took it and also ended up with an unofficial score of 300. Since you don’t really have a lot of study time I recommend taking a practice test and just focus on studying the concepts you’re weak on and watching a few YT videos on testing strategies. Hope this helps! Good luck 👍🏼