AITAH for getting upset with my family for not planning on getting me gifts for Christmas?

I am a 20F, I currently live with my Grandfather, my uncle, and his two kiddos (6 & 12). I’ve lived with my grandparents since I was little. My grandmother passed away a few years ago. My aunt ( my uncles sister ) is coming this Christmas with her husband and 2 kiddos (8 & 13). My grandfather doesn’t plan on getting me anything but providing for Christmas was my 4 other cousins. For reference my aunt & uncle are “broke” so. But, both my aunt, her husband, and my uncle have good full time jobs that make money. So I don’t know how this is possible. Anyways, i’m the one with absolutely no money. They expect me to buy them gifts, and my grandfather expects me to do the shopping for all 4 of the kiddos. A few years back my aunt came for christmas and she didn’t get me anything then ( which is fine). I got her a gift. My uncle usually gives me a little something like a dairy queen gift card. I don’t know if I’m just sad about not being a child anymore. Or if this actually feels like i’m being the asshole… for saying to maybe think about me? I’m a full-time medical student, and have a full-time job. I just wish they thought about me too, as I do for them. AITAH

ps. my aunt one time gave me car trees at 16 and I didn’t even get a car or my license until 18. She also knew i couldn’t get a car because I had medical issues.

EDIT: More context. This has been going on since I was 14 when my grandmother died. That was the last ever Christmas I’ve had where I felt like I was a kid. I’m not trying to be greedy. They exchange gifts within each other and the family. I just always feel left out somehow. Maybe that’s because I don’t have my own mother around anymore, she also passed from drug abuse related issues within months of my grandmother. My father has been out of my life since I was a baby. Ever since my grandmother died i’ve been looked at like an adult when I wasn’t ready to be. It’s not the christmas gifts I care about. It’s the greed and selfishness among their own kids they have.. I just want to feel part of the family. But they have their own little families and i’m kind of left out. My grandfather cares about the little kids when he’s the only one I have left. My aunt has her husband and kids, and my uncle has his two kids. It’s hard feeling like the only parent I have left doesn’t care about me.