I think i tore my acl?

at first i thought it was a bone issue, but now i think it may be my acl...? i was on a trampoline and i landed weird. it felt like my knee bent the opposite way its supposed to, and i heard a crack i think. i wasnt able to get up for about a minute but i was able to carefully hobble off. its been 2 days and i cant bend my knee in any direction, or put my foot completely on the ground. i've been hobbling around the house using my right leg regularly and my left leg not moving, but almost tip toeing on my toes. it hurts to move to the point where i start crying when i move it accidentally. help!