Looking for some suggestions for my girl!

This is my first time owning a dog. I’ve always had dogs growing up but this is the first one I’ve gotten on my own. I just have a couple a questions.

I have a horrible time with her nipping. Most of the time she is super sweet and cuddly but it seems like if she gets riled up especially at night she will resort to trying to bite or nip at my hands or arms or my fiancés especially our toes. She’s sweet but it hurts. I’ve tried to be mindful and take her out to play when she starts but it seems like that just makes it worse. She has plenty of toys in the house and outside. I think she is just overstimulated. Once she calms down she is fine. She is only 7 months so still a puppy. Any suggestions?

She has a Kong which she enjoys but the spray to go in it is so expensive. My mom suggested peanut butter which I have been doing on occasion but I worry about her health doing that all the time. I also have been doing carrot sticks on occasion as a treat. Any alternatives?

Thank you for any suggestions! Pic of my girl for attention.