I'm in the same boat. I caved in and am now taking a medication called Lexapro for anxiety. It's considered a mild medication. As per the rules my medical is voided. I talked with AOPA and they seemed to say it's not as big of a deal as you'd think.

First they said that talking to a counselor (psychologist, etc) does not count and is perfectly fine as long as you can self-certify that you're fine to fly.

Secondly, they said that when you're done you simply have to wait 6 months and then reapply for your medical and include a letter form you psychiatrist stating that the problem was due to life issues and was temporary, and that it is unlikey to happen again. This is a reasonable assumption since using the medication in combination with therapy will often times make permanent positive changes in brain chemistry.

Third, AOPA said you can technically still take part in flying activites that do not require a medical, as long as you can self-certify that you are safe to fly. I'm currently looking into sport pilot and glider flying.

Finally, I think a good part of the reason for the rule against this sort of stuff is because of the side effects: The stuff tends to make you drowsy and tired.

As for the airlines most don't care as long as you're certified when you apply.

Hope that helps.