Ay anak, totally normal yan sa late pregnancy, lalo na 36 weeks ka na! Ang pelvic pain at lower back pain talaga super common dahil sa weight ng baby at ang ligaments mo na nag-stretch, pero since may knee pain ka na rin, mas better if you check with your OB just to be safe, baka kailangan mo lang ng proper stretches or posture adjustments, or siguro may ibang factors na kailangan i-address. One of my mum friends swore by maternity support belts na talagang nakatulong sa kanya na maglakad ng comfortable, plus prenatal massages (yung pregnancy-safe) talaga nakagaan ng tension sa back at hip area, try mo rin regular rest, good pillow support pag natutulog, at avoid prolonged standing if you can. Kaya mo yan, mama, malapit na!