You certainly have my empathy. I was getting less than 5 days out of a bottle of 50 Benadryl. :( 2 at a time every three hours.
I think I've mentioned to you before that in Ontario, all this stuff goes to Public Health. I don't even know how many samples of mine have been 'negative' when sent there. A couple of the jars contained nothing but parasites. It's really a lost cause. I still haven't gone to get the results of the last ones because I just can't take hearing 'negative' again right now.
So it sounds like a really good idea to get yours sent to this other lab while you're still in the U.S.