Lost weight but gained inches

I have a question.... I went for a fill yesterday, and they took my measurements.. I have lost more weight, and overall lost inches... but my waist was 1 1/2 inches bigger... I have noticed a small difference in my clothes recently, but just thought it was in my mind that they felt tighter since my weight had not went up. Just curious if this has happened to anyone else? Or can anyone tell me why this would make sense? And just to put it out there before someone suggest's it may be my monthly issues, I have had a hysterectomy so I should not have the typical monthly bloat..
 Thank you guys for any help!