What's my fault for leaving after my best friend “jokingly” locked me out of my own apartment?

I (22F) live with my best friend “Lena” (23F). We’ve been close for years but she has this habit of taking “pranks” way too far. I’ve told her multiple times I don’t like them and they stress me out.

Last week I came home from a long day (exams + work shift) and she had invited a few friends over. I didn’t mind at first. But when I tried to open the door, my key wouldn’t work. She had LOCKED the chain from the inside. I knocked and she yelled through the door “hold on omg this is hilarious just wait a sec.” Everyone inside was laughing....

I wasn’t laughing. I was exhausted, carrying groceries, and it was raining. I asked her to open the door like 4 times and she just kept saying “one minute, one minute.” Finally I got pissed and said “Lena open the door NOW.” She opened it a crack, took a picture of me standing there soaked, and said “you look like a sad wet cat LMAO.” Her friends were dying.................

I just… snapped. I put the groceries on the floor, said “I’m done,” grabbed my bag, and left to stay at my sister’s. Later she texted “wow dramatic much?? It was literally a JOKE.” She said I embarrassed her by storming out and “killing the vibe.”.........

Her friends are now messaging me saying I “overreacted,” it wasn’t that serious, blah blah. Lena said if I “can’t take a joke” maybe I’m the problem......

I feel like I reached my limit but idk if walking out makes me the guilty here....