How do I handle a random girl who randomly has a problem with me at school?

This is my 3rd year in high-school, I already have things to stress about, I luckily have a Job and everything's going good, But the freshmen and sophomores are hellians, specifically this one girl on my bus, for whatever reason, she just randomly talks shit about me even though I had no clue who she was until last week, She's a sophomore apparently, but let's get down to the details. I was having a normal conversation with my sister and this girl goes "That Bitch needs shut the fuck up" She basically "whispers" this to her friend who is my neighbor as if I can't hear her while she's talking loud as hell, I didn't say anything cause the drama isn't worth it, so I brush it off and go about my day. Now here's the next 2-3 days, I'm sitting with my friend who, when the bus pulled up to the school, tries to get off the bus, same girl from earlier decides to try to push past her and proceeds to say "Well you're eager to go to school aren't you" in a dick like way, which irritated me very much cause I'm genuinely confused, cause we don't, once again, Know who this girl even is. And now finally, today while on the bus, Two new people took our spot in the front of the bus which I don't have an issue with at all, but then once again, same girl from those two said times turns to one of the girls and says "Oh I didn't know you were there, I thought you were those girls who talk too much" then she turns to her other friend "you know who I'm talking ahout right?" Now this basically pissed me off, Cause once again, Girl, Who even are you? 😭 and why are you picking fights with me, I wanted to say something but I thought it wasn't worth it. I had work today and I have no time going to work or being in school angry. But anyways, What should I even do at this point? I'm not sure whether or not I should refute or not, I know this seems very petty but I absolutely hate people who make random enemies with me when I never once knew who they are. Should I say something back next time?

How do I handle a random girl who randomly has a problem with me at school?
Post Opinion