Help! going back to tumbling after ACL sugrery?

I've been an all-star cheerleader my whole life up until 4 years ago when I tore my ACL & meniscus, and I always had small tears in my MCL & LCL! I screwed up my knee pretty bad! it was prob. one of the worst pains I have ever felt in my life! but anyways, I have the opportunity now to compete on the same all-star team I did 4 years ago! I'll have to tumble, jump and dance and all that fun stuff.the only thing Im worried about is the tumbling because of the landings! is it bad idea to go back after an injury like that? I did some flips on the trampoline the other night with a brace on and it felt fine and i woke up the next day with no pain in my knee! do u think I'll be okay If I build up my muscles and lose a little weight?( not that i really need to but i figured it might help)