i got into a fight with my mom - AITA?

So the backstory is that I've told my mom that I'll try to take the mcat in jan a couple months ago as just a side comment (but i didn't sign up for it). Time flashes, I just finished biochem and I wasn't able to take it in January. Then, I could sense her anxiety and slight disappointment so I told her maybe i'll take it in march, but all the spots were taken up. So I signed up for May. She was pretty disappointed and said that I should be on top of things and said she gets it because she also struggles with procrastination.

No one in my family is a physician, so she doesn't know anything about how the mcat works except from my anxious dumps and telling her what I've heard/seen so far from others that have taken it.

Right now, I'm doing an honors thesis spending more than 20 hrs a week in lab among other commitments. And after two ish weeks of this grueling study schedule I'm down with a sickness that I'm pretty sure caused from the stress and overworking. So I told her that I think this kinda her fault, that I could be taking it a bit easier had she not been so anxious and had reflected my anxiety. I know I could've said it a bit better but with the frustration from being sick and other things on my plate that's how it came out. I was implying that once in a while it would be nice if she said something like "it's okay to take it slow, make sure you're fully prepared and take it when you are ready."

I just wish she took a couple minutes out of her day and looked up the specs of the mcat instead of listening to my unrealistic schedules and expectations for myself. She and I are similar in the sense that we're quick to anxiety and judgement. Also, I'm taking two gap years so I could be taking the mcat next year around this time at the latest.

AITA for telling her this is her fault?