Early Labor

Ariel

I'm 36 weeks and 1 day. I was at L&D; last night over contractions and just feeling awful. They told me my contractions were every 3-5 minutes I am 3cm dilated, 80% effaced, and baby is at -1 station. They told me the contractions aren't strong enough just yet and sent me home and told me I'm in the beginning stages of labor. Has anyone else been through this? How long did it take before baby came?