It sounds like very early labour to me. I had irregular contractions at the start of both my labours. They started at 4am both times! DS2 was born at 9:41pm the same day that the contractions started (DS1 was born 37 hours later - yuck!).

Getting your DH to come home is a great idea so you can use the time to rest as much as possible while he takes care of your DS.

Best of luck! Try and have a nap if you can!