Sent home contractions 2-3 minutes apart

It’s 8am now. Contractions started at 7pm last night. I’m 40 weeks. They’ve been 2-3 minutes apart lasting around a minute each since they started. Went to the hospital I was a “tight 2cm” walked for an hour no progress walked for another 40 minutes and still no more dilation so they sent me home. This is my second and my first I never had this issue. Anyone else experience this?