acl sprain?

i tore my acl and had the reconstruction surgery back in june. i was playing soccer the other day n i was playing fine without any problems, i then woke up the next day and i had pain on my operated knee and it had problems straighting it out my leg felt stiff and it was hard to bend but also i noticed that my muscles felt stiff like my quads. So i dont know if it was a knee problem or just that my muscles were sore from being out of shape. i am just really worried that i could have hurt it again. has this happened to anyone before/?
its most likely just that your leg that you tore your acl is just out of shape if pain continues see your doctor immediatly you could have injured your acl again