I am sorry for your loss. I can understand your pain because I also have experienced a loss. But please do not eat emotionally. Unfortunately I made that mistake and gained 25 lbs in 5 months. And now that I am pregnant I am also overweight with this pregnancy. At the time everyone was trying to feed me and made me feel I should eat and treat myself, but that was horrible advice because food will not take away your pain and I hope that you can find healthier ways to heal. Look into yoga, zumba or just fun ways to get your mind off of things. And this will also better prepare your body for your next pregnancy. Good luck and I wish you well.
Grief is different for everyone. There's no telling how long it will take to feel better. Take your time and remember that it is perfectly normal to feel sad for the loss you've experienced. Don't let anyone tell you that it's time to get over it or it's time to try again or that it was "meant to be" because that isn't going to help. It is your pain and nobody else gets to decide how you feel it. Slowly you will have more good days than bad days. It will happen, I promise. My suggestion would be to not rush into trying again until you're ready. Your heart needs time to heal as well as your body. Take as long as you need.
Best of luck to you.