What might have happened?

Hi, so im not entirely sure this is the place to be asking this is about my ear. Anyways here's the question. For a while now my nose has been blocked and a friend recommended I should use this little bottle thing where you put in warmish watter and squirt it up your nose which is supposed to clear up your nose. So i tried this and when i used it, it felt like there had gone some air/water through to my ear somehow. My ear then was pretty painful so i decided to go to sleep and hope the pain goes away, 3 - 4 hours later I wake up and the pain is about 50% less but I'm almost completely deaf (its like im holding my finger in my ear deaf) in this ear now and if i move my jaw in a certain way there's like a little "crackle" in my ear. There's still some pain but like i said its not as bad as it was but then there is the rest (deafness and the crackle) If its still the same in the morning i'll undoubtedly go see a doctor but in the meanwhile I'd like to see what random people on the internet think ^^. I'm just scared I might have damaged my ear permanently.
What might have happened?
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