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 ??

[Roba]

The only people who can access your account are the ones who are logged on to it. I think you have to make sure she is logged out from your account otherwise she can still make changes to your profile or whatever even if you change your password it wont affect it.

[Louise]

I think your account was hacked