At 36 weeks, I am measuring a bit off...Experiences?

Thats really odd cause that happened to me too, I was always measuring perfectly 100% spot on, but on my 36 week appointment I measured a week behind. I posted a similar question too because my midwife had not mentioned anything to me, and I only noticed it because I read through my pregnancy record notes for that appointment. Everything turned out fine, and I measured right the next appointment. I am 39weeks now and measuring right again. I am sure it will be the same for you to. All the best!!