Overgrowth Between Left Thumb And Forefinger. The Lump Broke With Loud Sound. Uncomfortable. Suggest

I have had a Chat type of growth about the size of a huge marble in between my left thumb and forfinger for about four years. NOTHING would pop it and it didn't really ever hurt. Recently I was bending over the bathtub with my breasts ontop of the rim of the Turbo thus all pressure on my ribs (I have extreamly large breasts). I was upset and scrubbing vigerously when there was a LOUD pop and what felt like either a break but more like an explosion at the top of my ribcage. It hurt but there was almost a sense of relief or release accompanied with the pain. As the day went by it basically felt as though I had cracked a rib except I could breath in without it hurting which is my experience with cracked ribs. Two days go by with pain at about leval six. Third day I happened to notice the huge cystic type thing on my hand was gone!!! There is no way I wouldn't have known that thing burst except that rib cracking experience. I have noticed an uncomfortable feel