Which one fits better into the sentence?

“you needn’t to be so hysterical! ”
or
"you mustn't be so hysterical! "

the african society basically suffered the consequences of colonization and apartheid directly attacking the black people, first, during the colonialism and its main idea which which "white people" had better rights, affecting   them principally in the right to establish black people in their territories, access to quality education and health services and took away any civil right even to the black people to feel they have the same opportunities as the settlers.

i would say it means that you're never alone, that there will always be people supporting me and showing me that they care for me and love me

explanation: