Broke up with someone potentially suicidal

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This is my first time using this thread, thanks in advance for any replies.

So 2 days ago at a party i broke up with my girlfriend (of just over 2 months) because i couldnt handle the amount of stress she put on my life, plus she kinda had a blatant disregard for things that were important to me - so i ended it when she (as usual) started interrogating me about my feelings towards her.

She was drunk, I was sober and had been planning this for a few weeks. She proceeded to tell me she hated me, that she had cut herself because of me, and had tried to kill herself by OD'ing on pills. She suffers from anxiety, panic attacks, depression and sees a psychologist every month, and the last thing I want to do is to hurt her more.

And all i've done is just that. I bawled my eyes out.

Am I to blame for what she has done, and/or possibly will do to herself? My greatest fear is going to uni tomorrow and hearing she'd killed herself and it being my fault.