My pet rat is acting weird, i need help?

I've had her for about 4 months and shes not a year old yet. Usually when i wake up in the morning she comes out of her little igloo and is up on the cage, i let her run around for a little while. this morning she didnt come out and when i went to check on her she was acting really freaky, she walked up to the cage door but she was really wobbly and so i got her a piece of carrot and i usually hold outside the door so she comes and get it but the only thing she did was sniff around with her head in the air, until i put the carrot in front of her then she took it and wobbled tragickly into her igloo, im worried, shes acting like shes blind or just got done spinning in circles for a really long time, what should i do?