Hey is my weight and height considered okay? https://ift.tt/eA8V8J

I'm 26f and I used to be about 54kg and my height was 5 "6", when I was 20 and fit my Jean's fine. I'm now 26, I dont fit my clothing yet I have gained 1kg more so I'm 55kg and my height is 5 "7" Is this normal? I'm really concerned about my body weight and feel I cant gain and that I look too skinny?

goo.gl/FXiP5V