Get your GPA to a 3.6 and your chances become excellent (as long as your MCAT score is strong).
You may want to do a “glide year” and apply in June after senior year in college, holding a job (in a research lab preferably?) and going on interviews during that year. That gives you more time to bring your GPA up to a 3.6+ and to prepare for the MCAT.
You’re doing everything else right, and the fact you were chosen as a TA for the chem class is very eloquent 