Alhamdulillah, that's good news! Sakit pinggang tu memang common lah especially time recovery, a few of my mum friends complained about it too, but usually goes away dalam few weeks. Untuk selsema, just make sure you rest sebanyak possible and minum banyak air, especially if you're breastfeeding nanti. Kalau pinggang atau selsema gets worse, check with your doctor je to be safe!