Hey There - How frequently are you trying to feed her? Personally I wouldn't be assist feeding after only a month and half off food. This may just be stressing your little girl out more. Other then her not feeding does she seem healthy?

I would suggest waiting 7 days between feedings at this point. If you are feeding F/T you can always leave the rat in the enclosure with her over night, sometimes this helps. I feed my young ones live rat pups or weanlings depending on their size, you could try this is you are okay with live feeding.

Give her time and try not to stress out too much. She will feed for you!