Legs keep swelling ???

Thanks fellow DSers! I've been having this problem for 2-3 weeks now! I am 8 mos post op and had lost 125 lbs. until last week when I gained 7 lbs over a period of 3 days. Scared me so bad that I've felt guilty eating. My legs have swollen to the point they have started rubbing above the knees when walking which they have not done for about 3 mos. I thought I was at a plateau for abt 3 weeks until I gained the weight. So up
My protein? And drink more water? I've been eating more carbs in the form of veggies! Never eat fruit! Should I eliminate the carbs too? Help. I don't want the scale to go in the wrong direction! I do aqua therapy... Mostly walking and leg/arm exercises since I am handicapped & cannot walk or run! Thx for all your advice!