do you mean 'will now be charging' in the sense that you were charged for the call you had or in the sense that you will be charged for the calls in future?

if you have been charged for the call you made then i think you have every right to bring that up with your therapist. she should notify you of charges BEFORE you start racking them up.

if you weren't charged for that call but will be charged for calls in future then next time your therapist says that you can call her i would be upfront with her in telling her that you can't afford it.

in a way... it is a boundary issue. bound (ha ha) to come up at some point... i'm sorry that you are hurting over this :-(