dramatic weight gain for first trimester?

I'm 9 weeks pregnant. Before pregnancy I was around 110 lbs and 5'6" - a bit on the "skinnier" side and I like to think I was pretty fit and my stomach was fairly flat. But I swear I've already gained like 10 lbs 😟 and I'm only 9 weeks pregnant! (Baby is the size of an olive). I feel bloated and huge at all times. I know people don't start showing til much later but I already have a little stomach pouch I definitely didn't have before. Is this normal?