Load bearing Wall? I don't think so, but I'm no expert.

Hey cool people. So, I'm taking down my first wall in the building we recently purchased to be our home (formerly a church). These used to be the pastoral offices. I am wanting to get rid of the wall separating the two offices to make one big room. Keep in mind all outer walls of this building are brick/concrete. And a couple inside walls seem to be concrete. Another thing to mention is that there is a small loft area in only a portion of the roof to the left of the building. The rest is normal very steep roofing. Attachment 38708 (http://www.doityourself.com/forum/attachments/walls-ceilings/38708-load-bearing-wall-i-dont-think-so-but-im-no-expert-20140901_164936.jpg) There is a very obvious beam that goes from one side of the left pastoral office (starting at the outer concrete wall, and through the middle wall (that I want to remove) and through the right office going to an inner concrete wall and resting on it. This makes me believe that the middle wall (which I've demo'd a bit) is not supporting the beam, because the two outer walls the beam goes through are concrete (most likely holding the weight. Plus, all the weirdness in the wall makes me think its not much support either. I plan on stopping right where I didn't remove any more drywall, the double sided heater will stay in wall.