<p>@OP, I think there is essentially no chance that you will be allowed to stay at UC Berkeley for three years after you transfer there. Berkeley is very strict about its two year limit on transfer students to finish their degree programs and your enrollment will be terminated after two years whether you have earned your degree or not. The only exceptions are Engineering majors and double majors who can stay for a fifth semester with permission from the dean. Since Pre-med is not a major and an English major would have to petition the Dean for another semester after you have finished your two years and such petitions are very rarely granted.</p>
<p>Also, while you could apply for a post-bac program at a CSU I very much doubt you would be able to take pre-med courses by themselves at a CSU. You would already have a degree from a four year school and the lower division pre-med courses such as Biology, Chemistry. Physics and Math are heavily impacted at all CSU campuses making it virtually impossible for anyone but a CSU student who has been at a CSU for a minimum of two years and is still working on their first four year degree to take any of these courses. It may be expensive but I think the UC Berkeley Extension is only route you can take to finish your pre-med requirements.</p>