Eh sakit pinggang first trimester memang payah! A few of us mums dealt with this, my go-to was proper posture (easier said than done lah when perut dah mula membesar) and sleeping with a pillow between the knees. One of my friends swears by prenatal massage but kena careful pick someone yang experienced with pregnant mums, or try pregnancy support belt from pharmacy. But honestly sayang, if it's really bad boleh check with your doctor first to make sure everything okay, sebab sometimes they boleh recommend specific exercises or refer you to physiotherapist yang dera pregnant ladies. The pain usually improves once second trimester kicks in!