Can I join the British Army with an existing Minor anxiety complaint?

I have a minor anxiety problem, My GP has prescribed medication which I am taking, but I feel better and want to do something with my life. Is the army knocking back potential recruits for minor ailments? I am physically fit and have no physical problems. I am 30 and life is passing me by, I have thought about the army since I was 16 but don't want this problem to hold me back. Will the recruitng officers accept my story over that of my GP is he doesn't recommend me? Thanks ps, I would rather not go straight to the careers office and be rejected, but try and work rounds things first.