Oo normal yan sa first trimester, karamihan sa amin nararanasan yan, yung ligaments mo lumalaki na para sa baby kaya nakakasakit talaga, lalo na pag mahaba ang iniwan ka na lying down. Try shifting positions frequently, sleep on your side with a pillow between your knees (life-saver yan!), and warm compress helps din, a few of my mum friends swear by yung heating pad before bedtime. But since it's causing you significant pain, best to mention it sa OB mo next visit para ma-assess kung normal lang siya o may iba pang issue, lalo na kung tumatagal or tumataas ang pain.