I tried to be a PT two years ago. I had a low sGPA of 2.85, due to the fact that I messed around early in college and got a lot of C's in Bio/Chem/Physics. Later i went on to take A&P I & II (got A and B+) and a Microbiology class (got an A) and did good in a year of OChem and did above average on the GRE....and didnt get in to any schools (A&P grades helped to get my sGPA up, but micro and ochem grades didn't count to move my GPA up).
This is because most schools didnt even get a chance to look at my better grades or really good GRE-because they had a cutoff at 3.0 where they wouldn't even look at you-it was an automatic rejection. So it didn't matter that I excelled at higher level bio or chem classes, because my pre req classes GPA was bad. I would have had to retake more of those classes to get my GPA higher...but most schools would average the two grades, making my final grade (if I got an A the 2nd time around) a B. This didnt make a huge boost to my sGPA though like an A would.
So I chose not to retake those 3 or 4 classes i would need to retake to get my gpa up, and switched to podiatry. I took biochem and did good, got a decent score on the MCAT and I start pod school in August.
If its your dream to become a PT then press on and retake a lot of your science pre reqs. Or change like I did and go somewhere where you can get in. Pod school is no slouch, it is 4 years with a 3 year residency, not for everyone, but I think with PT school and how competitive it is, u might wanna change your path because of that GPA hole your in.