First time birth control user... Scared. Advice?

I'm 15 and I'm starting birth control this week once my period starts to help with my cramps, flow, estrogen migraines, and mood swings that come with my period. I'm actually a bit afraid for this step in my life and need some guidance. What should expect? Will people judge me because I'm on BC (I am not sexually active and probably won't be anytime soon). Please help <3