It does sound like pre-labour, but it could last for weeks. The pressure feeling does sound like bub has gotton comfy nice and low down, hopefully this will mean you can avoid a drawn out induction this time As you are not quite full term if the pain seems to become regular, or doesn't stop when you rest, then it is important to speak to your midwife for a checkup but in the absence of that it could be your body warming up for the main event. Are you planning on stopping work soon? This could also be your body telling you to slow down a little.