Baby then marriage

I have been raised in a pretty traditional hispanic family. Although i have been with my fiance for a little over a year and in the middle of planning a wedding in 2017 everything was going as I expected. However, three days ago i found out i was pregnant and i feel guilty and ashamed that i let down my own beliefs and nit be married but at the same time i am so happy and excited and could care less about what people (mainly family) will say. Any suggestions as to how to deal with this feeling?