Weight gained at 25 weeks

So at my very first appointment I weighed 202. My midwife told me to only gain 15 pounds due to the fact that I am considered obese. At 19 weeks I had only gained one pound and was super pumped!! My last appointment was at 24 weeks and 3 days and I had manatees to gain 12 pounds!!!! Granted, I was out of state for work for a whole week having to eat out every days plus we had tons of father's day picnics right before the appointment. My next appointment is in four weeks. Do you think it's possible to lose a little bit of that by then? I'm convinced a lot of it is water weight and me being so incredibly constipated.