Scared after scan!!😨

Diane
So today I went to get my 20 week scan redone as last time she couldn't get all the measurements of the baby, aftr she gad done all she needed to do she tild me that one of the baby's kidneys is swollen and that I'll more than likely will have to be rescanned and that also my placenta is lying low which will also need to be checked again. I don't know whjch one to be more scared about... anybody had any experience with either if these?