Now this is a long shot but I seem to remember a post from a lady who was investigated for terrible side effects and in the end she changed medication brands and was miraculously better.I can't remember which drug it was but I know that a similar thing happened to me with Toxifen.I usually get Genox brand but one time I bought another brand and I broke out in a face rash and had a bad headache.It was one of the carrier chemicals.I think it's good to get your lungs checked out and I hope you get the all clear.Tonya xx