dreading my 7.5 hour work day tomorrow

i have my client tomorrow for 7 and half hours tomorrow at the clinic (with obvious breaks) BUT he new to ABA and constantly tantrums in any room we go to, any times we do a learning session. any time we try to transition to a new room. it’s so exhausting today he was just tantruming every min for an hour, i almost blew my cool and my supervisor was on leave. but i’m absolutely dreading it.

his tantrums are when he falls to the ground and throws himself. when i say that a place is not available he will try to push around me like kick shove everything ahhh