33 weeks pregnant and growth scan says baby has dropped from 50th centile to 10th - worried

Im 33+2 weeks pregnant and just been to a growth scan and was told that the baby had dropped from the 50th centile to the 10th centile since my last scan 4 weeks ago. I'm now worried out of my mind, was given little information and told just to go back in for another scan in 2 weeks. Anyone had the same experience and everything turn out ok? Or any information at all will be welcomed as im not sure what this means for the rest of this pregnancy. I'm now worried something might go wrong between these 2 weeks.