pregnant hamsters????

Question
my hamster is acting very strange she is fighting with the male,she is making allot of nests,she has been biting allot, and she doesn't like being held lately.

Answer
What type of hamster is this?  It sounds as though she could well be pregnant. Was your intention to breed hamsters? If you want to let me have a few more details: i.e. type of hamster, age, how long she's been with the male - I might be able to help you.

Regards
Sheila