Mommy, that kind of one-sided pain at 36 weeks sounds like something you really need to check with your doctor or OB right away, okay? It could be ligament pain or sciatic nerve stuff, pero important talaga na malaman ng doctor kung ano talaga yan, better safe than sorry, especially when kayo nandyan na sa final stretch!
One of my mum friends had something similar and it turned out kailangan lang ng proper stretches at positioning, pero dapat confirmed ng doctor muna. Let me know how your OB visit goes, sis!