Confused.....

Husband and I have been TTC for a year now and we've had 2 miscarriages....last one May 5th....my sister announced her pregnancy with her 3rd baby a week ago....I'm happy for her and I congratulated her. Every day after the announcement she would make sure I knew she was pregnant. I couldn't take it anymore, so I told her to please quit telling me she's expecting that I got the point and I was happy for her, but I was still hurting from our losses and I needed some time to process my losses and her pregnancy....she said "ok". She then tells mom I'm exagerating that I should grow up and get over it, that I'm being selfish and immature. So my question is: Am I exagerating? How do I "get over it" if it hurts so much?