Ah, Rosebud, you made me laugh!
I am not laughing at you.
Just at the question... because it sounds like me when/if I ask my Husband a question, of which he thinks my questions are always from outer space and I am from a different Matrix... and he looks at me all weird.
I can just hear his voice.
LOL
Anyway, leather purses, wet, can tighten up or get stiffer etc. Seemingly shrink-ed.
Anyway, just Google search "does a leather purse shrink if washed."
Get a good leather product, the kind used for leather furniture. Conditioning creams etc. Or the kind used for leather shoes. Not, shoe polish. That just makes leather shinier and more water repellent.
Next time what I would do is, turn your purse inside out if you can. Then, put it out in the sun all day. After having, wiped down the inside with maybe a leather cleaner or Lysol wipes.
Make sure it is THOROUGHLY dried inside, so that mildew will not grow.