Concerned about eye prescription change

Hi there, I am turning 24 this year. My most recent eye prescription check was about May 2019. A few days back I went to get new glasses as I realised that my left eye was not seeing clearly if I covered my right eye. However, my right eye’s vision was still perfect in my glasses or contact lenses.

I am shortsighted and wearing -3.50 on the left and -3.75 on the right for my contact lenses. This is a much older prescription.

For my old glasses from 2019, I think the left was -3.75 and the right -4.00. The new prescription I received was -4.75 on the left and no change for the right at -4.00.

The right eye has always been slightly higher than the left but within a little less than 2 years, my left eye has went up by a whole -1.00, I am worried and wondering if this is a normal change since the right eye has maintained its vision from 2019.

Hope to get some professional feedback or explanation. Thank you all!

This is very normal. My eyes are the same and i do not wear glasses.