Within the last week been having left side joint hip pain. Made worse by sitting/walking and sleeping. Could these b related?

Yes this could be . One of several diagnoses related to the hip such as : bursitis, tendinitis, cartilage issue such as labrum, and arthritis as the more common possibilities with a knee or back problem sometimes presenting as hip pain or even a sacroiliac issue. There are other possible causes so if the pain persists or worsens, see your physician.