sun96,
Heh,.... if u dont know what tum tum hardening is, most likely u have not experienced it yet. What i felt was suddenly the whole tummy feels very stretched and when u touch the tummy, it is very hard and gets harder. Ermms, u tried being urgent and need to go toilet before? The tummy would harden a little when we are urgent. So tummy hardening would be harder than when we are urgent. First time happen, i panic, keep petting bb and telling bb to relax... was over within 5 mins. Next day ask my colleagues, they say is BH contractions. Quite normal unless it comes with ab pain or if it comes 4 times in an hr. That's what i read from baby centre website. But i think i would confirm with my gynae on fri as to how many times should i call her and get advice.