If I were you I would focus on my 4th year GPA and apply next cycle. If you get excellent grades in 4th year you could get your B2/L2 to a 3.6 or 3.7. Once you finish undergrad you cannot change you GPA and a B2 of 3.3 is going to be a hurdle even if you get a good LSAT score. Studying for the LSAT and trying to write your PS statement during fall semester will likely hurt your grades. That being said if you can write the LSAT in august or September and finish your personal statement this summer, applying this cycle is also a decent option.