Oooh urchin!!! Have u rung ur midwife?? I would, just to be on the safe side. U've probably read this yourself but:
Most women who are pregnant for the first time will ask their midwives or friends this question. The answer is often maddeningly vague, along the lines of: "You'll know real labour when it starts." Fortunately, there are differences between Braxton Hicks contractions and labour contractions that can help you tell them apart.
Braxton Hicks contractions:
are infrequent, usually happening no more than once or twice an hour, a few times a day
often stop if you change activity, so, walk around if you've been sitting, and vice versa
are usually irregular, and if they are regular they only stay that way for a short spell
do not last long, usually less than a minute
continue to be unpredictable and non-rhythmic
do not increase in intensity
Compared to Braxton Hicks contractions, labour contractions are usually:
noticeably longer
more regular
more frequent
more painful
keep on going, increasing in frequency, duration, and intensity as time goes on
You may experience what is called false labour. This is when Braxton Hicks contractions come more rhythmically, perhaps every 10 to 20 minutes in late pregnancy.
False labour can be hard to tell apart from early labour, particularly if the tightening of your uterus feels uncomfortable. However, during false labour your cervix won't have started to change yet. Your midwife will be able to tell by carrying out a vaginal examination.
So if they haven't eased by now, get the midwife on the blower so if *this is it* u can deal with it while still rather calm!
Good luck