I had these the past week or so too, thought it was braxton hicks then immediatley remembered braxton hicks were practise labour pains, so should last a few more seconds. my cramps are only seconds but catch me by surprise. Feels like it's a kick in the ovary (or where the ovaries used to/should be).. no idea where ovaries are meant to be when pregnant!! haha. Don't know what the pains mean.