AITAH For NOT telling my mother she never gets anything done?

For context, I am an A-Level student. My chosen degree is Mechanical Engineering, however none of my current A-Level subjects correspond with my degree, due to my lack of direction a year and a half ago when making my choices. I am planning to do a gap year because I don’t have a Maths or Physics A-Level without which I would not be accepted.

My mother has been made aware of every single change I’ve made. It’s important to know that I’ve informed her of practically every detail of my plans for my future. I do not have a bad relationship with my mother but I always have to tread lightly with her.

Today she told me there were 2 days until the deadline, I said ‘Cool’. She then starts getting at me as to why I wasn’t applying. I told her about the lack of qualifications, and explained that I wouldn’t be accepted anyway, and apparently it wasn’t good enough.

Eventually I agreed to apply to a few foundation years to make the lecture come to an end. Even when she got her way, it wasn’t good enough.

This led to another long, long lecture where it became obvious that she had no idea what the process looked like.

The next thing I knew it had been an hour and a half, and nothing had been done. This has happend so, so many times with different things of ranging importance, so I told her I had to study for a test tomorrow and left.

I was tired, annoyed, and when I got up to leave I said ‘I need to revise, the test I was talking about is still tomorrow.’ Those exact words.

I feel like I was being a bit disrespectful, and so does she, but I feel like my reasoning was pretty straightforward and her being upset is her choosing to create a problem out of nothing.

AITAH?