Head Submerged Under Water, Pressure In The Ear. No Relief With Ear Drops, Lying On Left Side. Muffled Sound. Suggestions?

Hello! I have a concern with an ear problem that I have. Two nights ago, on Thursday night, I had taken a bath in which my head was submerged under water for around 30 seconds. I felt water go into my left ear and I got up in less that 5 seconds to get it out...or so I thought. I had titled my head to the left side and I felt the water drain. I continued with my bath-I did not put my head back under water-and got out about 40 minutes later. While in the process of getting ready to go to sleep, I felt some pressure deep within my ear. I used to be a swimmer so I tried old ways to get water out of my ear and nothing seemed to work. I proceeded to go to sleep and I slept on my left side, hoping that the water (if it was water that was causing the pressure) would come out in my sleep. I woke up the next day with disappointment, the odd pressure was still there. I really do not know how to explain the pressure I am feeling, but it does not cause pain, it s more of an annoyance. It had effected my hearing in way in which it feels like there is an echo, or a muffled sound. If I pull back on my ear my hearing is back to normal, and I don t touch my ear at all it kind of feels like it is numb. I bought ear drops called Swim-Ear Drying Aid and that has only seemed to work for a period of time, and even at that it still is not working whole lot. I m really afraid that something is wrong and I don t know what to do! Please help!