Going crazy or not!?

I’m 19weeks weeks and I’ve only gained 3 pounds.. crazy right.. no exercise no dieting nothing.... I lost my second child by dieting and trying not to gain weight like I did with my first daughter... I also exercise nun stop.. so when I found out I was expecting this time.. I decided to sat down and eat right and watch my intake .. and absolutely no hard core exercises.... I’ve noticed lately that I can crave something then get it and take a couple bites and it’s back up...🤦🏽‍♀️I thought all the sickness would end coming into my second trimester.. my vitamins even make me gag🤦🏽‍♀️....any tips l.. should I be concerned....?

P.s. I hope all this weight don’t hit me all at once😫