Wa'alaikum assalam sis! At 36 weeks tu memang boleh jadi Braxton Hicks atau practice contractions, a few of us experienced something similar, tapi macam you, takde discharge or bleeding so far, yang lagi bagus. Since this is your second pregnancy dan rhythm-nya berubah, I'd still suggest check with your doctor or midwife just to be safe, especially kalau sakit tu intensifying atau jadi frequent, they can confirm if it's just BH or something else yang perlu perhatian. In the meantime, try changing positions, relax dengan warm compress, dan jangan worry sangat because many mums go through this and it's fine, but your doc should reassure you dengan proper check-up. Hang in there, you're in the final stretch!