Knee pain during jump squats, lunges, etc.

Hey guys I'm new here & I love Fitness Blender!

I will just jump to my question: when I do jump squats, lunges, squats, or just any exercise which uses my knees, I get pain in my knee joints; & I feel like it's hampering my workouts since I cannot give my 100%. Is it normal or am I doing something wrong? I'm pretty sure it's not my form though.

I look forward to your replies. Thank you.