Ahhh I feel you lah, malam malam memang worst time untuk bloating and nausea! One of my mum friends swears by makan smaller meals throughout the day instead of heavy dinners, and drinking lots of water (tapi jangan time mkn), helps with both the bloating and sembelit. Try also ginger tea or plain warm water lepas makan, and avoid heavy, oily stuff closer to bedtime sebab mmg akan trigger the bloating and nausea. Tapi if this keeps happening, best check with your doctor, especially if it's affecting your eating pattern, just to rule out anything lah.