Blood flow??

Amber

I am 33w 6d pregnant. Yesterday at the doctors they told me my baby isn’t getting the optimum blood flow from my cord? They aren’t sure why Bc it isn’t twisted or anything. They found this out on an ultrasound- they then put me on a Doppler where everything seem to test fine. I will continue to get monitored closely with this- but has anyone else had this issue? Anything I can do to fix it? Feeling a little worried but the doctors seem to act like it’s not a big deal?!