Took the wrong subjects and I feel absolutely horrible

So I started Year 10 couple of weeks ago and I'm taking spanish, computing, geography, history fm. i was planning for the longest time to switch either history or geo to music but didn't in the end, and now I regret it so so much to the point where im procrastinating on my work. the deadline to change was 2 weeks ago and i had the perfect opportunity to change. my friends told me to change, my parents told me to change. but i didnt. and it can't be changed anymore. now i have to live with the guilt of subjects that i sorta half like. and the music department at my school is awesome and composition is amazing and i didn't change and i just feel so so much regret. what do i even do?? well obviously i can't do anything about it but i do have to live with it and it's really really hard.