Uy, I feel you, first tri back pain is real! A few of us moms swear by proper posture (easier said than done, I know), warm compress, and honestly just resting when you can, kasi your body is already doing a lot. Have you tried prenatal stretches or a pregnancy pillow para sa support habang natutulog? But since you're still in first tri and the pain is bothering you, best to check with your OB para ma-rule out anything else at ma-suggest nila what's safe for you right now, kasi some remedies aren't okay sa pregnancy.