Ay sis, ganyan din ako sa second pregnancy ko around that time, ang tiyan ko parang bato palagi, especially pag may slight movement or pagod lang, at ang back pain talaga ang kumakalat pa, nakakainit ng ulo! Since wala kang UTI at may progesterone na from your OB, baka Braxton Hicks ka lang talaga (practice contractions yan), pero since ganito pa rin kahit rest ka na, best to follow up with your OB ulit para ma-check if kailangan ng additional monitoring or maybe adjust pa ang progesterone dose, kasi sometimes kailangan ng mas malakas or mas frequent pa. A few of us moms found na mas bumaba ang tigas when we really took it easy, meaning bed rest levels of chilling, pero hindi rin guarantee, kaya talaga yung direct check with your doc ang best move para peace of mind mo.