It happened yesterday.

Every morning, I would wake up and drink water from my bottle before breakfast. But it gave me a different sensation this time.
I felt bloated and fatigue after the drink. I thought it would go away. I only ate half of my breakfast's portion because my appetite wasn't there. Then I skipped my lunch and only drank a cup of orange juice ( No appetite ). Things were okay till evening. I felt tired and so I took a nap. Once I woke up, I had a very bad stomachache ( it's like the wavy sensation going around your stomach )and it lasted till night. I took a gastric pill , Eno and fish oil (it's regular). I burped alot but there were still uneasy feeling in my stomach. I thought it'd be fine by tomorrow so I went to bed. During midnight, I felt I had to fart, but it came out watery poop, and it only lasted for few seconds.


When I woke up this morning,
the bloated feeling is still there, but it wasn't so bad as yesterday. I had oats with a cup of hot Milo , and some biscuits for breakfast.
And yes, this is weird too. Whenever I tried to lay back against the cushion, my stomach would hurt really bad, but if I sit straight, the pain will disappear. I had lots of watery poop this morning, and then cloudy brown liquid passes through my anus and I know this is not right.

Could it be there are worms in my water bottle in first place? Or something's wrong with my digestive system? I'm really worried.

Please reply ASAP. Thank you.