Eh, dengan 38 weeks plus dah ada signs macam ni, better check dengan doctor atau pergi hospital je cepat-cepat, bukan main-main! Diarrhoea dengan cramping dan hardening boleh jadi early labour atau ada benda lain yang kena tengok properly. Jangan tunggu lagi, sayang, especially since you're so close to due date. A few of us went through similar and doc said it's better to be checked than worry at home. Go lah sekarang, they'll monitor you and baby properly. All the best!