That's pretty much nonsense that it'll interfere with your meds, so long as you're not smoking excessively (more than once a day, though daily is still a bit heavy). you basically just need to give your brain time to not be in a constant stoned state.

However, I don't know if you're anxiety is genetically predisponed or the result of circumstances. if it is genetic, you should definately avoid heavy use (and perhapse even moderate use) as it can worsen the symptoms when you're not high. However, this is largely due to your brain being dependant on the high just to stay calm, I wouldn't be surprised if other anti-depressants cause the same problem (I know they do at least in the short term).