How much does she weigh? What size prey was she eating before her fast and how often? She may have been fasting for many reasons. She could have been eating too large of prey too often, causing her to fast. If she weighs 600-1100 grams, she may have just gone off feed. They sometimes just do that at that size. Also, it may have been a regular winter fast.
I bet you feel relieved! I know I do since I just had one of my females begin feeding again after a long fast.
The fact that she just ate for you tells me that she's not gravid. She may have follicles, but she's not gravid.