I also have had 3 losses, and suffer from PCOS. Getting pregnant has been easy once I lost 20lbs, but staying pregnant has been difficult. My OB did a couple of things for me that really helped me out. The first, was that he put me on glucophage/metformin to help lower my blood sugars. One of the side effects of this medicine is weight loss. I honestly didn't change my diet or exercise, and that is how I lost the 20lbs. My weight loss was truly being hindered by hormone levels. The other thing that he did for us was to have me take a pregnancy test on day 30 of every cycle. If I had a positive test, I was to start progesterone supplements until he could get me into the office for a check-up and blood work. He gave me free samples to just keep at home. He said that with PCOS, your hormone levels aren't what a normal woman's would be, and that can be a huge factor in maintaining a pregnancy. By controlling the insulin and using the progesterone, we were able to get pregnant with DS #2, and everything is still going well. I am almost 34 weeks along now, and because of my previous losses, I am almost paralyzed about buying stuff to get ready for him because I think to myself that something could still go wrong. I am still struggling to overcome these thoughts. As far as whether or not to keep trying, that is a personal choice. I just knew in my heart that I would regret not trying and trying again because I would always wonder if a second child was possible. Not that I love DS #1 any less, but I always wanted at least 2, possibly 3 children. I feel like I could stop with two and be content, but I am also open to trying again for #3. So to wrap up my mini-novel here, give yourself time to heal and grieve your losses, but also really think about being willing to try again, and take the risk of another loss.You could end up with another broken heart, or the best reward life has to offer. Only you know what you handle in terms of the risk.
Good luck!