So am I overreacting.. My graduation is today. I expected my grandma and family would take me out to…

So am I overreacting.. My graduation is today. I expected my grandma and family would take me out to dinner after my ceremony. But when I asked her if we were doing anything after she says one of her friends is having a birthday party that she is going to. Like wtf? I didn't even want to walk out infront of all those people but she practically forced me by buying me a cap and gown even after I hadnt gotten one on purpose. The least she can do is buy me a yummy dinner. She hasn't gotten me a graduation present when everyone in the house has gotten me somethin even my grandpa bought me new tires. Im not trying to be selfish but damn I was more excited about having a good dinner than walking infront of all these judging people with my big belly. I can't help but be a little mad.