Fundal height help

Shannon
4 weeks ago (29weeks) I went to my doctor appointment and was measuring 5 weeks behind (24cm). They scheduled an ultrasound and baby was perfect in the 49th percentile (wahoo)! I had another appointment at 31weeks and I was still 5 weeks behind (26cm), but because I just had my scan, he wasn't worried. Tuesday I went to the doctor (33weeks) and was measuring 7 weeks behind (still at 26cm). I already had an ultrasound scheduled for two weeks from now and he said we will see what happens. I'm concerned that my baby isn't growing at all anymore or my amniotic fluid is low!!! Does anyone have experience with this? Thanks!!