Calcification on placenta at 32+4 weeks

Today I had an ultrasound and the tech told me that bubs was measuring where she should be at this stage but I'm 32 weeks and 4 days and he mentioned that I have a little bit of calcification on my placenta. I'm a ftm and don't know to much about it but should that be starting already? Does this mean bubs will come earlier? Or will need to come earlier? I have so many questions and don't have a doctors appointment for another couple of weeks so I'm looking for people's experiences and to know if this is normal so early?

Tech didn't seem to concerned okay this stage but should he be?