Please listen to your body. Don't be stubborn (like me) & learn the hard way. Take up to a week or two to dial it down a bit, do low to no impact cardio, & tons of stretching. Stretch max is awesome, and personally, when injured, I stretch as many days as possible (5-6/wk, usually). Particularly focus on stretching/strengthening what hurts, a foam roller is a nice tool to have in this case. Once you do start feeling better, take care to ease back into the workouts rather than just diving in head first. It would be terrible to re-injure something that hasn't completely healed yet. I learned this the hard way, was rehabilitating my Achilles, thought I felt great and went straight back into high intensity jumping drills, only to end up even worse than I was with the original injury.
Also, the back and knees often signify a foot problem. Are you wearing supportive enough shoes for your specific activity? Do you over-pronate (flat-foot)? Are you doing a lot of jumping on a not-so-shock absorbent surface?