Yeah, I don't know if this problem is what I'd call "common", seeing as a vast majority of women on birth control very much appreciate it. But that's why there's like ten billion different types. The first one you try isn't necesarily going to be the right one for that particular girl.
Anyway, I can't help but notice that everytime you make a statement about something she does, you make an immediate defense of how its nothing to do with you or she never gets angry at you or stuff like that. Why is this necesary? Do you have some subconscious feeling that these problems DO somewhat stem from your relationship? I mean, you said she's been on the pill for six months, and things in your relationship have been rocky in the past few months, but thats a MAJORITY of your relationship. You need to really figure out what it is you're missing in these conversations, because you two are honestly not talking about and working out the issues at hand. If you were, you wouldn't be here. I agree that talking to each other 24/7 is a little overboard. You NEED to get your school work done, and do some other things, and so does she. But you honestly should be devoting a lot of time to each other, because its a relationship like any other. She needs to get off the pills if that's the problem, and you two really need to talk about where you want the future of your relationship to go, and how you feel about it currently. If ya'll are coming to a concensus on what ya'll need to do, put it into action.
I'm drowning in assholes.