39 weeks and 2 days !

I have been having contraction for about 7 hours and they vary from being 8 minutes apart and 7 mins apart. I just woke up this morning and it starting happening.. is this real could this be real labor lol I'm just not believing it at this moment the contractions hurt so bad when they hit and they wrap around my back they last from 15-35 seconds, when should I go to the hospital, I'm having a vbac?