my poor pentax

In February I went to Berlin for some days. And my Pentax got wet.
It literally took a bath because the water from a bottle that apparently didn't close well transformed my backpack in a pool. When I noticed I was dripping I went crazy and emptied it in the middle of Karstadt. But obviously my Pentax was already soaking wet.
We took it home, it was snowing, I cried a bit. There was a fully exposed roll of film in it, too, which make me cry even more. At home, we cleaned it and left it open to dry.
The next day I shot a test roll, which came out just fine. Happy End.
But since then, some of the photos come out like the ones you see above. It only happens to some rolls of film, and not to many photos, but still.
It's so unpredictable!
Has something like that happened to any of you? It must have something to do with the diaphragm not opening/closing properly...but I don't get why it works sometimes and other times it doesn't. Grrr!!

Tomorrow I'll show you some nicer photos, I promise.
I hope you are having a wonderful evening.
I think I'll turn the heating on for the first time. My hands are freezing cold!