So am 40+1 with my first and this is how the last couple of days have been:
Mon: woke up feeling 'off' & tired (despite having slept just as crap as usual!). Started getting sporadic lower back/front period-type cramps in the evening & a few painful ones overnight. By morning, nothing.
Tue: felt much better & full of beans. Occasional cramps during day & some more in evening. Woken by some quite painful crampy/sharp pains.
Today (wed): Feel a bit crap, got a sharp shooting/pulsing pain a bit higher up on RHS of back that literally made me go "oww oww oww oww!!" Then it (thankfully!) went.
It all seems a bit odd & stop-y start-y, but is this my body's pre-amble into proper labour??