My hammy is acting wierd please help

[emiliahammy]

I have a Syrian female short-haired hamster, she is about 7-7.5 months old. I've had her for a little over a month, she is my first hamster so I get very nervous when she begins to act strange. when I first got her she would wake up around 11-12 and run on her wheel all night and be very active. as time has progressed she has been coming out later and later it is currently 3:30 am and she hasn't come out of her house at all, I can hear her making noises she just hasn't come out, she hasn't been running on her wheel much ether, im just starting to get really worried. please help

[Pebbles82]

I shouldn't worry - their habits change sometimes. Does she seem ok in herself when she's out? Also has your routine changed at all? Later nights eg? Our hamsters won't use their wheels until the lights are turned off and when I had a couple of late nights they just came out later - when the lights were off.