I keep thinking I'm in labor and as soon as I decide to get checked it stalls :/

So, I'm 38.2 weeks and at my last appointment I was 3cm and 75% effaced. Last night from 11pm to 4am I had contractions that went from every 7 min to every 2 min. They were every 2 min and incredibly painful for THREE hours...felt like I was being torn open from the inside out and I told Ben we'd go to the hospital. AS SOON as I started getting ready to go they started slowing down. Every 3, then 4, then 6 and finally every 10 with no pain just tightening. Wtf. This happened the other night, too. As soon as I think about going to the hospital, it slows and then stops. Anyone else going through this?