Yes, I've experienced this a lot. My weakness seems to be mostly in the left side of my body. I've dropped lots of stuff. On some days, just lifting my arms to wash my hair tires me for the rest of the day.

I just got back from a vacation, and we had a jacuzzi in the hotel. I knew I can't tolerate heat, but I went in it anyway. I was outta there in five minutes, and my entire body turned into jelly. I couldn't move for a few hours. I won't be getting in a jacuzzi ever again!