AITA for getting my drink at mcdonald's

I (18f) went to mcdonald's with my friends (18f) (19f) (fake names) veronica and lindsey. I went inside to order my drink on self serve, while my friends waited for me in the car. Once i finish my order (one smoothie) i went and waited at the pick-up counter. A women in about her early 20s was waiting infront of me off to the side, her drink came out a few seconds before mine. As she is picking up her drink she turns to the counter to ask a question, so I go up and grab my drink (the exit is on my side so I might of cut her off) I start walking out and she is following really close behind me. Once we get outside she tuns to me and looks me dead in the eyes and says "holy fuck bitch" I at this point have no idea what happened, I walk up to Veronica's car widow and knock on it to tell her what happened, she gets out of the car and so does Lindsey, at this point the lady is yelling "I know your fucking talking about me, you wanna go" and flips us off, as a reflex i flipped her off aswell, she gets in her boyfriends car and they drive off. A few seconds later she pulls up behind our car and her boyfriend start honking at us for atleast a minute. We ignore it and they drive off. So redit AITA for getting my drink off the pick-up counter at mcdonald's.