Rings very lose!

Ralstonk2

My rings on my hands that I wear everyday and have been perfect fit are now really lose! To the point that when I do things with my hands they turn over, like upside down. It's really annoying! But does that mean that maybe all the water I'm drinking is helping me lose some weight? They are so lose that I could probably go down half a size! I'm curious about this because when I weighed myself this week I've gained 3lbs in the past 2 weeks. So I'm feeling very discouraged. Any thoughts!?!?!?!