Should i tell teachers first?

So besically i have tics and im in term 3 of P7 (uk) and i was wondering if i should tell my parents first or my teachers first. I think my teachers have noticed ny tics but they haven't spoken to me about them. Where as my mum keeps telling me to stop and i just try to stay calm and explain i cant help it so i tend to just stay in my room full time now just chilling. Also has anyone any ideas to try stop my tics throwing things? And when i have a tic attack what should i do in my room to keep myself safe? I ALWAYS seen to get hurt 😢. Idk what i should do if my mum sees me when i have a tic attack what i would say because she wouldnt belive me and think im faking it. Any advoce would be amazing! TKS