Hi I Have A Knee Cap That Feels Like It

Hi I have a knee cap that feels like it is going to pop if I strain it the wrong way, I have recently been doing a little more exercise than usual to assist weight loss, It hurts when turning in bed at night and definitely worse when going down stairs, it feels most sore on the front right hand side of the knee cap, It is on my right leg, it has gradually become worse over time, I have been wearing a knee mild support neoprene knee wrap for comfort and warmth, I also use supplements like glucosamine chondrotin MSM magnesium & omega 3 oils, thank you Marian