I had Braxton Hicks from 22 to 30 weeks, very sporadic, then started experiencing back labor in the form of false labor.
I had this the other day they lasted about 5 minites and cam every 15 mins for an hour... i phoned the hospital who advised me they were just BH.. everyone is different though!
If they are not becoming consistent, they are probably just BH. When I had my daughter, I was in pain all day, but I thought that it was has pains and constipation. It wasn't until several hours later that I realized that they were about 4 minutes apart and went to the hospital. You might want to get a contraction timer to keep track of the data.