ok i no this has nothin to do wit ncis but i really need some help ok i just hurt my ankle really bad and its green and swollen and purple idk wat 2 do

i was on the trampoline with my three cousins ones a freshman (guy) sixth grader (girl) and fourth grader (guy) the boys decided they decided they wanted to wrestle me and the freshman grabbbed my ankle and turned it and i fell to the ground yelllin and they thought i was just playin a round and so th efourth grader held me down and the freshman fell on me my uncle and aunt arent inicial yet so know one knows cept my cuzs wat do i do