Need Advice!

I was diagnosed with IC and Vulvodynia 6 months ago. I have been taking Elmiron 300mgs daily for the past 6 months. I did start noticing relief of symptoms within 3 mths. But I have been experiencing hair loss for the past 3 months more now than ever. My urologist recommended I decrease my dose of Elmiron to 200mg. It has been a week. Twenty four hrs. after I decreased the dose I started feeling symptoms again. THe frequency, pelvic pain and/or burning. Everyday! Could it be possible to start feeling the symptoms so soon? If there is anyone out there with similar situation please advise. I am really new to this. Thanks