Frustrated and in pain

So last night i was having contractions (very very PAINFUL) ones that were 1-2 minutes apart lasting about 1 minute, i waited an hour, they progressed and got worse so once 2 1/2 hours hit of being in unbearable pain we left to the hospital. Once I got to the hospital I couldn’t walk and could barely talk. They checked me and I was at at 3.5, had me attempt to walk the halls and an hour later checked me again and I didn’t progress so they sent me home. I just am upset because if they were THAT bad and they want you to come in for the 5-1-1 rule how am I supposed to know when I need to leave my house to go! I live 40 minutes from the hospital so it’s very stressful!