GF broke up for religion after pregnant? Is this a valid reason?

Me and my girl friend were together for 4 months. Mean time she got pregnant. We always argue about religion. I am a hindu and she is a christian girl from Mid south. I am more encourging saying please continue your religious belief I will go to Church with you, read bible and pray to Jesus. But she asked me to convert to christianity. My parents would not like that. So she broke up with me now for religion after she is pregnant. In the last conversation I said I will convert but give me sometime. She asked me to missionary work and forced me to goto church on wed, Sun mor and Sun eve. It is painful after we broke up for religion.