Do I have a mold problem (picture)

Okay, i've been noticing random symptoms that come and go out of no where. One moment my throat will be sore, runny and itchy nose, nausea, i feel like crap all the time, tired and run down, i have other symptoms that randomly take place to but I cant pin point that its this problem. In my bathroom behind the plastic that is covering the wall in the shower to prevent water from getting in has failed and has started to rot the wall behind the plastic take a look at the picture and tell me what you think.

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