Taking the PCAT in October is not recommended in my opinion. It's near mid-terms and it's difficult to study hours a day for the PCAT when you're taking several classes. I recommend a July or September one. Also, if you take it in October, you won't be able to apply early decision. You'll have a better chance in schools with rolling admission if you apply early decision.
As for your grades, the summer and previous grades will be the only ones reflected in your pharmCAS gpa until the academic update which begins mid-December. During this time, you'll have a chance to submit your fall grades to pharmCAS.
Set up your application when you're avoiding homework this spring and get familiar with the process. Request your LORs as soon as the new application cycle begins (June I think) and work on your personal statement. This will give you time to finesse your application and be prepared.
I did the same thing you're doing and rushed everything at the last minute. It seems like you have everything planned, but you've left no room for anything to go wrong. I didn't get in the first time I applied for this reason. Start working on everything early!