I wouldn't worry too much-your first trimester sounds just like mine went. I gained about the same during the first two months as well-but I SWEAR 2 pounds of it has been in my chest.
It was my first clue that I was pregnant again-I "knew" a week before my period was even due-it wouldn't even register on a test yet.
I had really bad morning sickness as well-REALLY bad. The worst out of my three pregnancies. I am now a little over 15 weeks, and in the past 3 weeks it was declined slightly. I still have the occasional "gag reflex" or episode, but it isn't all the time now.
Carbohydrates, rather than protein, tend to ease morning sickness a little more-but obviously we all want the cakey-comfort food type stuff. If you like apple pie or fried apples and consider that a comfort food-here is a low calorie trick that is also a fruit serving.
Core an apple with an apple corer (Not red delicious though-they are usually too sweet-other varieties are fine.) or cut and apple in half and remove the core. Put a little cinnamon on the halves or in the cored center, and a SMALL smidgen of sugar. (As in, a pinch.
) Microwave this for 30 seconds or so at a time, checking it each time-until it is cooked through. You can have a warm comfort food taste for about 100 calories.