It doesn't hurt to mention it to your midwife but I think it all sounds pretty common. Maybe you are having even a little bit of constipation? Try drinking some good fluids and extra vitamin B helps with morning sickness!
And you're at that awkward stage where you don't have a noticeable bump but are probably a little pudgy....it's the worst! It'll get a lot better once you're belly gets rounder and random people will recognize that you're having a baby!
Feel free to mention it to your midwife or dr, that is what they are there for :) but also know you can come over here and ask questions anytime. There are so many wonderful ladies on here and nothing is TMI or gross for this site with pregnancy we often talk about bleeding or poop because thats what comes with the territory ;)
As for your tummy it sounds normal. I don't think it's that you are fat though you may feel fat, I know I do! Don't worry about weight gain just listen to your body, eat when you are hungry. If you have morning sickness they say eat whatever you can keep down, worry about healthy eating once all food stays down. I know potatoes were the only thing that stayed down in my first trimester I ate a lot of French fries lol after four months when the puking stopped I could eat fruit, veggies and all the good stuff :)
Feel better and don't worry about your tummy, bloating and water retention is so normal
You will have alot of bloating throughout now n water retention, I'm 21 weeks and today is one ov my fat days as I call them I'm soo bloated n I feel Hugh, its pretty normal but I'd still say anything you wanna ask just mention it to ur midwife they will answer any of your questions