Suggest Treatment For Pain In Knees And Heels

Hello, since I was a kid I have been having problem with my knees but, nothing major ,at least that I know. I am 28 years old , healthy and I work out almost everyday.However, I have been feeling feeling pain in my knees and heels for the last 5 years.
Yesterday, someone told me that I should go to see a doctor and for some reason I freaked out and I thought that I was not gonna be able to walk.After that I had a panic attack that made my legs feel so weak and I thought I was going to fall.
Even though sometime I have pain in my knees and heels I have never experienced before that weak legs feeling.
Can that be due to the panic attack that I had?