Anti Anxieties while breastfeeding

Between my preexisting GAD, being a new mom, and my never-ending family disasters I think it is time I start an antianxiety. I have been having anxiety attacks that make me wants to jump put of my skin and cause myself other pain so they stop. Last night I had to hold my head really tight and push on my stomach to try and make the feeling stop, but ultimately had to wake up my husband to hold me.

Anyway.. I don't know if I need one to take all of the time, or just an as needed pill. If you are on one while breastfeeding what do you take?

I have a therapist, but who do I go to to get a prescription?