How do I stop feeling bad?

C: Cousins got me a Christmas gift for the first time this year (I didn’t give them gifts but will buy some late)
T: “I feel terrible I didn’t get them something first”
F: Guilt
A: Can’t stop thinking about it, wonder if I should text them saying I forgot to bring their gifts, get gift cards last minute, feel bad
R: I get them gifts but feel bad it’s late

Any tips to stop feeling bad about this?