I have a question about my hamster.?

Okay my hamster is 5 or 6 days pregnant. And shes having a lot of trouble walking shes only increased by weight a little but when she walks her body kinda like leans to one said and its very scary. Sometimes she will even fall on her back or something I am very worried. Is there anything wrong with her or is this normal. By the way she is a teddy bear hamster. Please help me and if you could give me any other help or advise that would be great!