With your high uric acid, i would say that it could be gout. My husband has it and when he's in a flair up, the pain is real bad. Talk to your doctor, there are preventative meds that might be able to help along with a course of oral steroids might help as well. Good luck to you.
Uric Acid swelling can be relieved with a daily regimen of natural (unsweetened) cherry juice or cherry's (8 - 10 per day). Start regime with a bowl full of cherry's and for 10 days reduce or eliminate bread products. I know this sounds crazy, but it really does help! You will notice improvement in approx 10 days, if not then by 30 days for sure. See book 'Foods That Heal".
If your foot is swollen, then that's a sign that something is physically wrong with your foot/ankle somewhere I would think. Being run over and injured when you were little might have something to do with your pain at this time. Maybe something didn't heal correctly, etc.. As far as your foot "shaking" when you hold it, I'm not sure what you mean by that, or what would cause it-unless it's from some sort of muscle weakness?. If I were you, I'd see a doctor to find out exactly what's going on. I wish you luck,
shinty