my hamsters behavior

Question
The past couple of days my hamster has been up a lot on her wheel and playing around her cage. Then just today, I took her out of her cage so I could clean it. I put her in her playpen and she wouldnt stop drinking water. Then while I was cleaning her cage, I was holding her and she was moving really slow. She has never done this before and I am really worried. She is about  1 and a half years old and she is healthy and usually energetic. She has a crittertrail cage and it has quite a few tubes in it,she has a ball to roll around in although i don't put her in it that often because she hates it!  Please Help Me!!
Thank you for your time.

Answer
Dear Melanie,
thank you for your question.
I think you should see a vet with your hamster. Her behaviour might be normal or a sign of old age, but it might be that she's sick. I cannot be of any help with this because I have no medical training, sorry
Jennifer