measurement dilemma

So I am currently 31 weeks and 3 days just left my doctor appointment and kind of freaking out. When I went two weeks ago my belly measured just right on track at 29cm now at 31 it's measuring 33 instead of 31. I'm hoping it was because I had a different person measuring me this time and not that it's too much fluid or anything. Has anyone else dealt with this. Because I'm super organized and have all my dates written down from my period to days of sexual activity with my husband. So send some advice my way please please