You sound like someone who lives to try and make others happy. You don't want to let the recruiter down, or otherwise feel like you led him on. Which, to be honest - shows you were probably raised to be very considerate of others. Which is the silver lining in the cloud, here.
You must look out for you. Even when everyone else in the world is considerate, the number of people they interact with on a daily basis is too large for them to think very deep into your circumstances, needs, wants, etc. In the real world, people (particularly sales people and recruiters) will try and make you feel very close, socially, and that you're really helping them out of a bind by buying/signing and/or that it's going to be some monumentally awesome thing for them (and you). You're going to have to be able to protect yourself from this kind of manipulation, going forward; hopefully without becoming bitter and jaded.
The key thing to remember about the National Guard and the Reserves is that it is, more or less, intended to be a part-time position to be the "Ready Reserve." It's intended to go alongside other full-time work and prospects. I had my full time job and my reserve duties every few weeks. Some people actually lost money when they went on deployments or did things for extended periods of time with the military because their civilian side job paid better. For many of us, it was an okay amount of pay for a weekend of catching up on paperwork and a bit of training. We could still bid into deployments and other stuff - and I very much enjoyed South Korea. The UAE was okay, though I have no idea where the people in the shopping malls got their money to spend. Very weird place in that regard.
I think your best course of action is to calm down and carefully consider what it is you want to do in life, and see if the National Guard or one of the Federal branches of the Armed Service has programs in place to help you realize those goals - and if the stipulations of those plans are agreeable to. You started off on this, getting rather angry at something out of your control, and deciding to try and thumb your nose at it by joining the military. Now you're rebounding and leaping back away from that decision because you're not entirely sure what you're about to get yourself into.
Don't just ask questions like "What do I want to be when I grow up" but "Why do I want to be a Pharmacy Tech?"
When I joined the military, and when I left the military, both decisions were based on the same principle and, interestingly enough, my oath of service. Neither were snap decisions made out of anger or impulsiveness. Not to say that there was a lack of people who ended up in the military for that reason - quite a few people got pissy with their employers and walked straight out of their job and right into a recruiter's office - and a fair number of them ended up perfectly happy with that decision.
But in your case, if you are going for a medical related degree - there are the Medical Corps (if I remember correctly - it's been a while since I dealt with it all), which consist of officer paygrades. These are dentists, doctors, pharmacists, etc who perform the treatment on military bases. They aren't commissioned officers and don't hold commands, and they don't have the same physical requirements... it's something you'd have to actually discuss with someone who works more in line with it, if that interests you.
There are, also, a number of tuition assistance programs available through the military. You gain access to various portions of the VA, etc, etc - so, there are a number of things that can help you achieve your goals in life well beyond the simple pay.
If you don't know why you want to be a Pharmacy Tech, or where it is you want to be in another five, ten, fifteen years - then many of these questions/options are harder to answer for.
