Here's what you're looking at:
First there's the question of getting in. Medical school is extremely competative. Applications are generally due in the fall and most applicants will be writing the MCAT around now (if they haven't already) and that will be for admission in 2015. If you have to upgrade or get in those prerequisite courses or write the MCAT, then you won't even be able to apply until next year for admission in 2016. In addition to a high GPA and MCAT score, admission committeess will generally look for extra-curriculars that will be indicative of a successful career in medicine as well - this includes volunteer work and practical demonstrations of soft skills such as leadership, communication, compassion, etc.
Once you're in you then have the training. Consider 4 years of a medical degree - you would likely be graduating in 2020. After this, you decide on a specialty and enter a residency. Even familiy medicine has a 2 year residency program these days and more specialised fields set it at 5 years. As a resident you're earning (a little) money though, so maybe you'd be happy with that. Don't expect much of a social life though.
Finally there's the reality of what being a physician actually entails. While it's nice to imagine that you'll be able to sit down with every patient, wrap your mind around their problems and cure whatever disease they come up with and then go home, relax and enjoy your hard-earned paycheque, I think the reality is a lot more like being trained to be a gourmet chet who is then forced to work at a fast food stand for 12 hours a day, every day. You get minimal time with patients, have to make judgement calls based on data that is limited, conflicting, or sometimes doesn't even exist. You face constant critique from colleagues (that's meant to be constructive, but you're decisions still come under the microscope). And bad calls can result in extremely serious consequences for your patients and potentially law suits for you.
If you're okay with all of that, then go for it.