Suggest Remedy For Knee Aches

I am an 18 years old female and only 4 foot 7 or 4 foot 8 tall. I keep having knees ache since I was 17. My knees do not ache every day. Usually, they ache at night, rarely during the day. But, sometimes they ache much that I cannot go to sleep, stand, or it. It feels like my knee bones need to be stretched. I tried stretching exercise but it does not help much. Is it growing pain or something else because I don’t think I cannot grow anymore? I was also 4 foot 7 or 4 foot 8 tall when I was in 9th grade. I think I stopped growing since then. Thank you!