Thanks ladies ... and yes Topsy that is a brilliant way to describe it!
Rang the mw and she assured me that all is normal ... she said the baby is either engaging (which would give me a sore pelvic area as everything stretches to accomodate her - damn I knew she would get her daddys head)
or ...
the tendons are stretching of there own accord getting reading for the impending arrival.
Soak in warm bath tonight for me ..... yay!