Chrissy Teigen is still mourning the heartbreaking pre-term loss of her and husband John Legend's baby boy, Jack.In a lengthy post shared to Instagram over the weekend, the 35-year-old cookbook author opened up about how she's been struggling ever since she lost their third child due to multiple complications last fall.«Just reminiscing about New York a lot lately, when things were simple, thinking about all the stuff I’ve done and been through not just this year but in my life.