I gained over 5 my first trimester but I was considered under weight.. my doctor told me I needed to gain 40 pounds

in the first trimester you honestly don't need to gain any weight you gain plenty toward the end

not five weeks lol five months! During your first trimister if you are a healthy weight per pregnancy you should gain 1-5 pound. Then 1 pound per a week for the rest of your pregnancy

I'm five weeks and have gained five pounds.