My knees haven't recovered from going heavy a month ago.

I was going heavy for almost 3 weeks straight, setting a new PR on squat and leg press. I hit 435 on squats. I have taken it super light for almost a month now, and my knees still feel extremely uncomfortable on anything above 225. Is it over for me boyos? Do I need to completely stop lifting for a month? Getting old sucks, but I'm only 35???