My teeth are rapidly falling out, i have swollen gums and my mouth is sore. what could i have?

Periodontitis: Periodontitis or gum disease started with bacteria that is left on teeth and gums. This caused an infection around the gums and other supporting structures of your teeth. Eventually the bone around the teeth is damaged and teeth become loose. When the damage is severe, all teeth must be removed and dentures placed. Sometimes this chronic infection can affect other parts of your body, heart, kidney.

Sounds like: You have generalized severe periodontitis -- simply put - severe bone loss resulting in un-supported teeth, hence loose teeth, gum inflammation and infection. I recommend you be seen by a dentist as soon as possible for treatment.