can have a varied presentation, right from mere sleeplessness
to making the person unresponsive. In your case as you have stated that you are having anxiety symptoms earlier , hence the current worry that the mold in the bathroom might have caused you weakness in the legs, fatigue
and nausea could be more of your anxiety than actually what it is.
May be you can consult a psychiatrist
who would like to train you in some cognitive or behavioural therapy.
Hope I am able to solve your concerns. Thanks , and have a nice day!