Fat or water weight?

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My upper stomach has suddenly gone quite big compared to my lower which is smaller which isn't usual for me. It's happened over the last few days and is uncomfortable feeling. It's very jiggly. I'm wondering if it's fat or water retention. I haven't drank as much water as I usually would. Thanks to anyone who knows how to tell the difference. I haven't over eaten either.
 
I'd see a doctor... Could be an enlarged liver :oops:
You were right. I had a text to go to the GP for routine bloods. Comes back liver enzymes very high and very low platelets so I've been told to come back next week for another blood test.