trembling

I have been feeling more run down than usual the last few days. About an hour ago, as I was standing in the kitchen my arms and legs became suddenly weak and began to tremble. Since then I have been having great difficulty walking and completing simple tasks such as typing, eating and drinking. Heart rate is within normal and I'm breathing well so I doubt I will go to ER this time unless it worsens. I also noticed that my urine is cloudy again. I will mention this to my doctor tomorrow.