Jealousy has set in

My sister in law just announced her 2nd pregnancy, due in April. She is the 5th person I know due around that time. As I come up on what would have been my angel's due date, it gets harder and harder for me to get excited for anyone. To be honest, it hurts, it's killing me. I should be celebrating a new baby on the 16th, but I just sit here, bitter, dwelling on my failure to conceive.