Panic attacks

Has anybody experienced an increase in anxiety and panic attacks while pregnant? I had such a severe one out of nowhere last night around 1am and had to wake my boyfriend up and luckily he helped me through it.....although I did take a QUARTER of a QUARTER a .5 klonopin, I figured it wouldn't be enough to hurt the baby but to calm me down but I was just wondering what other woman do to help with their anxiety? This is the first time I've taken klonopin while pregnant and I would like to know a self remedy.