for the past 3 weeks i have been feeling something stuck on back of tounge or in throat , difficulty speaking, dry raspy, constant trying to hack up irritant. ocassionally (once per day) hack will produce 2cm x 1cm x 1cm chunk of hard dried mucus like material. The shape is consistent. This is followed by an immediate increase in ability to breath and speak with a decrease in need to hack. Infrequently will caugh up small pebble (.25cm dia) very hard, very sharp object like cartalige or bone. Help