Twitter help please ?

[Alice❤]

Ok so last night I changed my twitter bio then the next day at school I looked to see that my twitter bio was changed to "I'm a bi*ch" and I want to find out who it was. I have a friend who I have fallen out with I I think it could be her as she was the only one who had my account logged on to her phone and when I asked my group about it she said she deleted her twitter app on her phone and only uses her laptop (coincidence I think not) so basically is there anyway I can find out who it was ??