The painful thing about TTC

Today, a co worker of mine announced that she's pregnant. Happy news, right? Not for me. Not for a woman who's trying to get pregnant. She wasn't even trying to get pregnant and now she's blessed. I did my hardest to keep the tears back while I was at work and to smile and congratulate her, but as soon as I got in my car, I bawled my eyes out so hard. That news broke me. I'm looking for a new job tonight because I can't hear and see her go through her pregnancy. My friends and SO keep telling me that my time will come, but I can't handle it. It depresses me to even think about it. Is it crazy of me to quit for this reason?