Ahhh I totally get the confusion lah, kejang boleh datang dari both sides, especially kalau your back muscles still healing dari operation. A few of my mum friends yang pernah ada back issues during pregnancy cakap yang pregnancy hormones (relaxin) membuat ligaments relax, which can make old injuries act up. Lepas operation lagi, muscles probably still adjusting, so combined with pregnancy weight changes, body aches boleh jadi lebih intense. Honestly, this one kena check with your gynae atau back specialist together-together so they know your full history, they boleh advise better whether it's the SD flaring up or pregnancy symptoms, or both playing together. Jangan worry, maraming mums manage this, but better get professional eyes on it!