AG/ Citizens maternity jeans

Va
So I am trying to order some maternity jeans online- I'm looking at the AG, Citizens, and Paige brands. Typically I wear a size 26 in these brands but I'm not sure if I should order a size 27 or stick with 26. I'm only about 4.5 months and can still wear some of my jeans using the rubber band trick but some just feel too tight. This makes me think I should order a size up, but I also don't want to end up with huge jeans. Anyone with experience with these brands?? Please help! Thank you!!