Am I a bad daughter for not gifting my mothers birthday

I (F29) live a very frugal, minimal, and hermit lifestyle. I haven’t bought anyone gifts in 6 years. My mother turns 60 this weekend and we are having a party for her tomorrow. But I don’t have a gift for her. I am starting to get anxiety about it, but it isn’t out of the norm. Am I a bad daughter because of this? Am I an asshole?