25 Week weight gain.

Hi ladies. I am now 25 weeks and just got back from the Dr. I started my pregnancy around 130 pounds. By 21 weeks I was 137. Now today at 25 weeks I am 146. How do I gain 9 pounds in 4 weeks!? The Dr said I was fine as long as I didn't get gain 10 pounds every month. I was very hungry the last few weeks but I feel like I'm evening out. With 15 weeks left I'm very worried I will gain too much weight. I know baby needs me to gain weight which I had no problem with. I just do not want to gain an unhealthy amount. Anyone going through this or have any words of encouragement. Thank you!