I had my ring for a little over a week when I took it in to get resized cuz it was too big. I got it back last night and now it's too small. I can fit it on if I really try. But getting it off is difficult. I've never worn rings before so I don't really know how the sizing works. I understand that finger sizes fluctuate. So my question is what is the best time of time to go for sizing? I don't want to keep going back for resizing if I don't have to.