Help!

I have been having strong contractions for the past 24 hours , went to the women's center and the nurse monitored me for a hour , checked me before and I was 3 cm dilated and 80% effaced. The nurse said she would check me in a hour and if I changed at all they would keep me but when they checked me I didn't change at all so they sent me home. And I'm in so much pain.. I have so much pressure down there and horrible cramps I feel like crying!!