Don't count yourself out just yet - you've got a solid chance if you're on 9 waitlists. If you end up not getting accepted and have to reapply next cycle, I recommend doing a couple things. First, like what others have said above, retake the necessary classes to boost your GPA and also re-take the GRE if you believe you can better your score. Aside from that, I think it would be more beneficial to spend some time and really work on crafting your story.
Do you have any other EC's besides working as a PT aide? Please don't take offense to this but student profiles like yours (semi-low GPA, average GRE, and worked 2 years as a PT aide) are a dime a dozen. You have spent 2 years working in a PT clinic - that's great...but so has everybody else applying to PT school - that's a very typical path to PT. There's nothing inherently bad about your stats/profile but I think your problem might be that you aren't standing out to admissions committees. Without unique/outstanding EC's your admissions file is easily forgettable and you're getting passed over for students that have similar and unique EC's. Retaking the GRE and replacing a C+ with an A- are good things and show your dedication, but they don't help your story. What are you bringing to the table? Why should those PT programs choose you from all the other applicants with similar or better applications? What unique experiences and perspectives are you bringing with you that will enrich the class and program? What are you passionate about? What gets you out of bed in the morning? You need to think about these things and leverage them so you can stand out to the admissions committee. Make them remember you.
Depending on the school the admissions committee will be looking at anywhere from several hundred to over a thousand applications. Average GPA, GRE, and 2 years as a PT aide will get lost quickly if you don't have a great story to tell. Make them remember you.
If an admissions committee asked you, "Why do you want to be a PT?" and your answer is something like: "I've really enjoyed working in a PT clinic and want to help people" or "I got injured in high school and had a great PT and that's what made me decide I want to become one" you need to try again. While those are good and valid reasons for wanting to become a PT - they will get you nowhere in a large applicant pool. Make them remember you.
If you don't mind sharing, what are your EC's besides working as a PT aide?
Best of luck.