Could this be early labour?

Last night at about half 12 i woke up with a sharp pain at the bottom of my stomach this lasted a few seconds then went. i then woke up this morning and had a few sharp twinges in my back this too only lasted a few minutes. Then a few minutes ago i had the runs which ive herd is your bodys way of emptying itself out and getting ready for labour. is this just a coinsidence or could i propbably go into labour soon? im 38 weeks.