Knee problems

I have been having knee problems for awhile now but it is getting worse in the pass 4 days

- sat for about 30 minutes then got up and my knee was - stiff and hurt to walk
- Laying down and knee-starting hurting around my meniscus. (3x)
- Knee swollen
- Feels more stiff then my other knee.
Knee sounds pops loud when bending and unbending
Feeling pressure on my knee
- felt a circle of pain in my knee