Is my roommate bulimic?

Hi everyone, so my roommate and I aren’t very close, but there has been several times where she’s been in the bathroom throwing up. It’s happened sparatically over the past few months. Tonight she had cereal and popcorn and then like 30 min later she went into the bathroom and was throwing up. She gets something in her closet before going into the bathroom and I don't know what it is but this has happened two nights in a row now and yes ik it could be a bug but she’s been going to classes and doesn’t usually throw up during the day. Also she is on depression meds cause I see her pill bottle on her desk. Please help me and what is wrong with her?
Is my roommate bulimic?
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