Contractions?

Leanne
Not sure if they're real contractions or Braxton hicks - 3 days ago my stomach started to go hard and then ease up. This happened a few times during the day. Yesterday the same thing happened but I started getting dull back ache too but this happened every hour or so. Today the same things happened except it started every hour, reduced to every 20 minutes and they've been varying from top of my stomach to lower stomach and back again. I got a sharp pain in my lover left stomach but that's only happened once and then they started going down to every 5-8 minutes. This has eased off and they're back up to every 20 minutes or so. None of them have been painful though so it's just Braxton hicks right?