calcium on my placenta 😳

Ashley
So I had a doc apts yesterday that went well I am currently 35w6d and my baby boy is 6lbs2oz already!! So the doc says wow this is a big boy 😂 and knowing that I have about 4 weeks to go she said the maximum weight from him to get is right at 8lbs because of how small I am!!! Which made me a lil nervous because he is going to continue to grow regardless... So then she tells me that my plactena has calcium on it meaning it's mature (I guess 😂) so then I get even more nervous 😳 but she just told me that I probably want be going the whole 40 weeks which made me sooooooo happy because I'm TIEEEEDDDDDDD 😂😂 
Has anyone else experienced calcium on there placenta? Was there any problems with birth?Â