Water in my lungs?

[mxnjay]

When I was a child, the doctors noticed some water in my lungs and had to get it drained. Way before the draining, I have choked on liquids (as people do sometimes) but I almost drowned in a pool once and inhaled a lot of liquid. I was fine after the drowning incident though. I was pulled out and I coughed a bit and that was it. It's been like 10 years or so now since the doctors drained my lungs and from time to time I still choke on small amounts of liquids. I try to cough and clear my throat, but I still don't feel satisfied. I feel like the liquid is still there. My lungs feel irritated and I don't know if it's because there is still liquids in there or if it's just from the irritation. I just get paranoid that the liquids will just stay and build up. When is the time I should worry or see a doctor?