How do you reduce the swelling in your gums and cheek until you get to see a dentist ?
You can reduce the swelling in your gums and cheek before you go for your dentist's visit by placing a warm compression on the cheek. You can also apply a mixture of baking soda and water to the swollen gum. Check out http://www.livestrong.com/article/228579-home-remedies-for-swelling-caused-by-toothache/ for more tips on reducing the swelling.
If you can tolerate it,and your dentist says OK, an anti-inflammatory tablet, eg Naproxen Sodium. (aka. Alleve or store brand.)
You can gargle warm salt water. And eat soft foods , noodles, soups , breads.