Knee pain – THR was July 1, 2020

Hey everyone, thanks for all of the comments and input on my initial post in August.  I started doing some light and short jogs during September, always alternating with walks. I also do some biking, swimming, strength and core work. I had no issues so I increased my slow run segments. I experimented with different run/walk segments as I felt some pain mainly in the groin area during and after longer run segments. I communicated with a long time running coach who felt I was doing way too much so I backed down considerably about a month ago. I am now doing either 2 min runs alternated with 1 min walks, or 1 min runs alternated with 30 second walks and doing over 60 minutes of running every other day.  Yes it is a lot of segments but it is still very enjoyable to do some type of running. My issue recently is I recently began to feel pain and stiffness in my right knee. Not so much when I am running but afterwards, particularly if I am sitting for awhile. I have been doing some light weights with my legs (leg extensions and leg curls) to see if strengthening it will help but so far it is not improving it. Have any of you ever had pain/stiffness in the knee below your THR? If so, what did you do to relieve it? Thanks in advance for your input.