My female guppy just had babies a few days ago. She has been acting very strange, she was hanging around the bottom alot and just sitting there. I changed the water in the tank and she seemed better. Today she seems like she don't have much control of her tail or somthing. She is swiming very strange and hung out around the bottom most of the day. She just got caught up in the bubbles and couldn't control herself in it at all. Any ideas on what may be wrong with her? The other 3 seem fine. Thanks for your help!