snake

I was watching tv and my maid suddenly told me that there was a snake in the toilet.
I went up to take a look and there seriously was one.
It's brown and small but green on the underneath.It moves really quick in an S-shape.
I think it may be a water snake cause of its movement pattern and also its able to raise its head like a cobra.
I quickly closed the shower's sliding door but it got wedged halfway.
I opened it a little bit and it slithered back into the shower.
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I checked on it a few minutes later and it suddenly went into the corner of the sliding door.
Its tail got shorter and shorter and it suddenly just disappeared!!!
I thought that maybe it was in the side of the door so I just kept it close.
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My dad came back home and when he opened it, the snake was no where to be found.
Now I'm worried that the snake could be anywhere in the house.
What if its in my bedroom. I might be sleeping then I heard this 'ssssss' sound and open my eyes to see that its in front of me O.o!!!!
I'm even afraid to go pee now. What it was in the toilet bowl??!!
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I know my hamsters are what attracted it into the house. Keeping them on high grounds now. Hoping for the best =/
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