Am I bloated? What is this? Help?

I'm an 18 year old male and woke up with a very full stomache, I stepped on the scale and it said I weighed 3 pounds more then usual. also the upper part of my stomache sticks out so now my whole stomache sticks out. Also I felt very full throughout the day and after a breakfest of just cereal I was not hungry at all untill dinner time around 7 o'clock.
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Am I bloated? What is this? Help?
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