Hi. You should have yourself evaluated by a doctor to see if your symptoms indicate any potentially serious condition. The fact that you're feeling as though your lungs are "surrounded by water" doesn't necessarily mean that this is what is happening. For now, you can do yourself a big favor by stopping cigarette smoking. This habit, if continued, will surely lead to complications like cancer and chronic obstructive pulmonary disease later in life. So quit while you're still ahead.