Wa'alaikumassalam! At 38 weeks, those crampy feelings mixed with the mucus plug losing (lendir darah tu) are actually very normal signs your body's getting ready, but cramping with on-and-off pain that comes and goes, especially if it gets stronger and more regular, boleh jadi Braxton Hicks or even early labour signs, the breathing helps like you're doing! A few of my mum friends had the same thing at this stage and some went into labour within days, some took another week or two, so it's really hard to say. Thing is, even though doktor said no dilation yet, these symptoms combined (especially the mucus plug) are worth checking with your PAC again jika the cramping gets more intense or regular, or if discharge increases, better safe than sorry when you're this close! Hang in there, your body knows what it's doing even if it's sending confusing signals right now