Consistent lower back pain

Hi mommies, currently 31w2d preggy. Bigla akong nakaramdam ng consistent lower back and pelvic pain (right side) after ko mag afternoon nap kanina. Yung pain niya is parang ngalay pero kahit anong position or pwesto ko, even nakaupo hindi siya nawawala. Tolerable but uncomfortable. Is this normal or concerning na po? I got treated and cleared naman na for UTI recently. First time mommy here kaya I'm not sure what to look out for pagdating sa ganito. Thank you! #pleasehelp #firstbaby #1stimemom #firsttimemom