Gemma Collins has opened up on her battle with polycystic ovary syndrome (PCOS), which she said caused her to gain weight over the years.The 39 year old, who recently said she was so happy she "could cry" after reuniting with her beau James Argent, took to her Instagram feed to share an incredible throwback snap of herself from her 20s.The former TOWIE star revealed how she was 'very slim' in the photo as she donned a gorgeous black and purple summer dress while posing in front of a swimming