Gained 5lbs in 16 days!!!

What the heck is going on??? I lost weight early on and got back to my pre pregnancy weight 16 days ago. Now I'm +5! I'm not eating bad foods, just a lot more fresh fruit. Not eating junk. Not gorging myself. Yes I have a larger appetite but I thought snacking on fruit would be the best choice. Anyone else have a huge gain out of nowhere?! I'm only 14w2d. :/