Weight gain?

Can someone tell me what a normal weight gain range would be for approx. 25 weeks pregnant? I'm 5' 2". With my first child

I was 125 pre-pregnancy and 170ish when I gave birth. This time around I was 135 when I got pregnant and I'm at 151 now...I'll be 24 weeks on Friday. I'm so worried that I'm over-gaining this time around. 😬😳