Based on the picture, the mucus stuff looks just like candida. And you have quite alot of it. In case you don't know, it is now thought that all autoimmune diseases like fibromyalgia, etc. are caused by dysbiosis (candidiasis, SIBO, IBS, etc.). You should concentrate on treating both candidiasis as well as leaky gut. The autoimmune conditions as well as overworked immune system are caused by leaky gut.
There was a problem with the link for that photo you uploaded. It should work with the link below: