Wah, 2cm sudah, mesti excited you're at this stage! Honestly with my second one juga, the waiting game is the hardest part, a few of us mummy friends swear by staying active (which you're doing with the walks, good!), drinking lots of warm water, and getting plenty of rest in between contractions so your body has energy for labour itself. Since the pains are just coming on certain days without other signs yet, boleh try relaxing in warm bath or shower to ease the discomfort, and make sure you're eating well and staying hydrated. Best to check in with your doctor or midwife about what's normal for your progress and when to head back to hospital, since every pregnancy is different and they'll know your situation better!