Kiteman - As you stated, your severe gout pain developed over night, which I presume was while you were asleep. So instead of focusing on what you eat or drink, focus on what's happening when you sleep.
Gout attacks during sleep are caused by the reduction of oxygen in your body resulting from sleep apnea, which is the frequent stoppage of breathing during sleep for many seconds at a time. Gout is an early warning of sleep apnea, which over the long term can lead to more serious life-threatening conditions such as heart disease, diabetes, kidney disease, high blood pressure, cancer, etc.
Make sure that you don't have sleep apnea. You are fairly young for sleep apnea or gout to develop, so you may have to be very persistent to get your doc to arrange for you to have a sleep test. Overcoming your sleep apnea will probably cure your gout, and will certainly reduce your risk for developing those life-threatening diseases. One thing to keep in mind is that drinking alcohol shortly before going to sleep exacerbates sleep apnea.
Based on my experience, the swelling of a gout attack lasts much longer than the pain. But if you take steps to assure that you don't continue to have gout attacks, the swelling will eventually subside.