Aimee, I think your daughter is over the moon that she can spoil you this year, now that she's earning. She is well aware of everything you have done for her over the years and wants to give you a bit back.
Don't worry that you have "only" spent ÂĢ500 on her this year, that is still a huge chunk of cash and she will appreciate the gifts you have chosen for her.
In future years, instead of buying three expensive gifts, maybe you could buy her one expensive gift and lots of inexpensive ones, which will bulk up the number of gifts, without increasing the actual amount you have spent. I hope that makes sense.