I am beginning my senior year next fall and will be taking the MCATS next april. My overall gpa is a 3.48; however, my science gpa is about a 3.2 (3.178). My science gpa is somewhat low because I got a C+ in botany my sophomore year. I am planning on my gpa to increase, but i do not think it will be much above a 3.3 (still have to take O-chem and physics -- I have an A- in O-chem so far). How much do you think this may hurt my competitiveness? To further my application credentials, I have volunteered 50 hours in an osteopathic ER. Do I need more or is this sufficient?