Wa'alaikum assalam! Yeah, this is super common at 27 weeks, the baby is putting pressure on your bladder so you'll feel like you need to go even when it's just a little bit, especially if you're drinking lots of water like you are. Since there's no pain or burning, it sounds normal, but if you're worried or it suddenly changes, best to mention it to your doctor at your next checkup just to be safe, ya.