I think that the poster who asked what the goal is behind Sherut Leumi was asking a good question. Is there a reason you would rather do that then continue your education?
I am asking because from what I hear, unless I am reading you wrong (if I am, I apologize), Peninim has a seminary that sounds as though it might be right up your alley. I have a niece who also does not fit a real mold, she is now at this sem and she is thrilled. She is not typical Beis Yaakov, yet MO is not for her, either. They are very accepting, very open-minded, very encouraging of questions.
If you think this might interest you, post me back and I will ask my SIL for info.
Whatever your decision, may you have much hatzlachah!!