Is my ex sending hints or trying to piss me off?

So I broke up with my ex recently about 3 weeks ago and the odd time I get a notification on my phone that she is tying on Snapchat but she doesn't send anything. I shouldn't be high on her Snapchat list or even be her "best friend" on it because we haven't talked in ages. She would definitely have to scroll to find me. Now I know she struggles with anxiety when it comes to texting someone first but I don't know if she is trying to get in my head or does she want to say something to me. I can't seem to work out which. Or does anyone have another idea why she might be doing this?