First of all mold is a big factor in many autoimmune diseases and infections. Mold suppresses the immune system which makes pathogens and infections thrive. Many improve by just clearing their environment from mold or moving away from moldy environments so I'm surprised that this Dr is completely dismissive of mold factor.
Bile acid sequestrants like Cholestyramine are effective in removing mold and have low side effects. Second would be activated charcoal, not as effective but still solid. Another effective way of reducing mold load in the body is chlorophyllin (we use life extension brand) Another great reason for using chlorophyllin is that it has a right amount of copper which will balance zinc orotate . Other forms of copper can be toxic.
More on mold here http://www.survivingmold.com/
Here, we're big fans of Herbs and are on Buhner's protocols for Lyme, Mycoplasma P, Bartonella (DD13 and DS11.) diagnosed thru Igenex. Get the books and go on to full protocol, don't just do herbs and not other things that he suggests. The protocol is really working great for us and I'm not seeing any side effects so far, been on it for 4 months now with my DD.
It's great that you're thinking outside of the box as that kind of thinking will get you the results, classical medical thinking with their 3 weeks of antibiotics will get you nowhere. A lot of best Lyme, PANDAS, Autism Drs are the ones who's children fell ill or were affected one way or the other. They realized that their medical education had not much to offer and were digging for info and reading publish studies.
You should read this very carefully about dr Ann Carson writen by a betterhealthguy.com Scott Forsgren. (his website if full of best info available.