Fundal height too small

Today I had my 28 week appointment and my fundal height was measuring 3 cm too small. My midwife did a quick ultrasound to check my fluid levels which were perfect and she said my placenta looked great too. Baby is transverse right now which she said could be why it’s a little off. They had me do a NST and everything was fine with baby, but I have to get 3 growth measurement ultrasounds over the next two months to make sure baby is growing properly. Is anyone else in the same boat or had a similar experience? I’m trying not to worry too much just yet, but I am a little anxious about all of this. I’m also short, have a small torso, and my midwife always comments on my “strong abdominal muscles”. Maybe that has something to do with it too? 🤷🏻‍♀️😕