Retake hs

wanted to get some advice on my situation since I don't have anyone to turn to and starting to feel depressed. I am 19 and will graduate at 24 maybe even 25

Just began my first year at a Canadian non target and can't transfer to Ivey or Queens due to not taking a second grade 12 math course. I only had to take one math for my current program and i thought i wanted to get into PWM but i realize now that i don't want to.

I have the option of retaking all my hs courses and boosting my average as well as taking the second math course but this means that i would be a first year at 20 and would graduate at my non target or at queens or ivey ( idek how many transfers they take but still hoping for the best) at 24. I know people have dealt with far worse shit and this forum is about breaking into the industry regardless of circumstances but i feel like shit and just want some advice.

This isn't a pity post just looking to hear from anyone who graduated late at 24 or who has heard about someone who did something similar to me or any advice that would be helpful.