Anxiety and Guilt After Shopping with Dad

I recently got a P-EBT card and my dad was excited for us to go shopping and buy a bunch of keto stuff for us to eat. When we got to the register, the card didn't work and he got mad and began ranting about having to pay for food that was supposed to go on the card. I kept apologizing and even convinced him to return some of the groceries we didn't need. After a while he noticed that I was really unresponsive to things - because I get really high anxiety when people are angry for any reason around me - and began saying things like, "we can go get those things when you fix your card," and "I'm not mad at you I just got frustrated about the card," and "it's not a big deal." Then he began talking about funny things and messing with me by poking me and trying to tickle me. Even though being touched when I'm in a bad mood and anyone touching my face/head period makes me angry, I know he was trying to make me feel better or distracted me. Of course I just feel more guilty that his efforts didn't work though. I know he's not mad and I know that it's not really a big deal but my anxiety is still so high after we got home that I don't know what to do. I locked myself in my room so I don't accidentally cry in front of someone, but just thinking like that makes me feel over dramatic. I just hate being like this.