AIO for being angry/upset that my girlfriend cancelled our celebratory plans?

With my job I have had three years worth of exams to become chartered in my field. It was results day yesterday and my girlfriend and I had planned to go to an event at our favourite bar to celebrate if I passed or take my mind off it if I failed.

My girlfriend has been feeling quite low for a while. She suffers from depression but won't go back to the doctors to get her medication reviewed.

Yesterday I found out I had passed. I told my gf and all she did was a little smile and mumbled well done. Later that day she said we'd have to cancel plans because she didn't feel like going out.

I asked if she was serious since she knew what the plans were for and she just shrugged. She then barely spoke for the rest of the night.

At the end of the night she started talking about the fact she was feeling shit but I just asked if she could even pretend she gave a shit about me.

She asked what I meant and I just pointed out I had passed my final exams and it was like she didn't even care.

For context when she passed her masters I got her flowers, a card and we went for a night away to celebrate that I planned and paid for.

She said I wasn't being fair but I just pointed out she'd cancelled plans she knew I was excited about and barely even congratulated me when she knows how much this means to me.

She said she can't help how she feels but I just said that her feeling low doesn't stop her from at least pretending to care about me and my achievements.

I said there's two people in the relationship when she seems to think it's just about her.

She said I was being cruel but I just told her it hurts that I was happy I'd passed and she couldn't be bothered to be happy for me.

She just said again I was being cruel towards her and she can't help feeling low.

AIO for being angry/upset that celebratory plans got cancelled?