So I had knee surgery when I was 17(33 now) and I got back into working out about a year ago after 5 years off. I slowly started squating on a smith machine with no issues. Well now I'm back to free barbell and im starting to get knee swelling and clicking when I squat. I really want to keep going and become a better squatter but I'm afraid that past injuries are going to hold me back. Any advice? Can I keep going?