Weight gain in third trimester

Harley

Why is it that I keep gaining so fast it seems, I have gained 5 lbs since tuesday, that was 4 days ago :(

I don’t eat excessively, I work a lot and I wonder if its swelling too but there is no way I jumped that much in 4 days by eating even.

What is wrong with me.. I am only 31 weeks pregnant and I have gained 38 pounds!!