I'm sorry you're having so much pain. Generally, severe pain is what brings us to the surgeon, and there we find our knees are bone-on-bone, or close to it. Severe pain can make us cry out quite loudly; personally I have been there many times. The good news is a knee replacement, when needed, fixes the pain issue. Yes, you'll still have pain when recovering, but it's a different pain that lessens as time moves forward. Pain from a bad knee will not lessen, but will continue to worsen, or at least stay bad, until the knee is fixed.