(Concern) When I lift something a little heavy, my right knee joint aches. Should I go to the hospital?

Recently, my right knee joint has been aching when I lift something heavy. Sometimes, it happens after hiking for more than three hours. I'm worried that I might already be developing a problem with my knee joint. It's okay during daily activities, but it happens when I lift heavy objects. Once my knee starts aching, it continues even after climbing stairs for several days. Will taking joint supplements help resolve this? Or should I go to the hospital? I enjoy walking and hiking, so I'm really worried.