How much weight did you gain first trimester?

Alexis

My SO is slightly scared for me and anxious for me to gain some weight. I have been up and down lately. I started at 117 and went down to 110 then back up to 115 and then back down to 113 and I keep losing the weight I gain and going back to 113. I don't know if this is normal because with my first son I gained 3 pounds slowly during the 1st trimester.