Onyx,
I've been on a few anti-depressants since starting HRT; Wellbutren, Lexipro-the list goes on-and none of them have had any interference with my hormone regimin. Just ask your physician. They should be able to help.
Also, as someone who has been diagnosed with BPD, mild bipolar, and a hundred other things depending on the year (this year is depression!), let me offer you this advice: In the long run, it doesn't really matter what your diagnosis is. The key thing is to treat the symptoms you're experiencing, and that is usually how treatment plans are enacted. What issues are you having, and how can they be addressed-that's the question that's most worthy of focus. Bi-polar is just a name for a set of symptoms, as is borderline personality disorder. What really matters are the issues you are experiencing: mood swings, depression, dysphoria, or anything else. Focus on those. Not on labels. Your life will be a lot easier.