Considering Army Reserve or TxNG. Chances of medical MOS?

I'm considering the Reserves or National Guard to help pay for college. My ultimate goal is to be a Pharmacist. I'm currently at community college for my pre-Pharmacy pre-requisites. Also, this summer I will finish my certificate in Pharmacy Technician. In a perfect world, I'd like to get 68q as my MOS. I got a 72 last time I took the ASVAB, but will have to take it again. What are my chance of getting this MOS or any medical?