Oo sis, normal talaga yan sa early pregnancy, hormones mo kasi ang gumagulo, lalo na ang progesterone na nakakaaffect ng sleep at body temperature mo, kaya parang AC palagi ang feeling kahit mainit pa! A few of us moms experienced the same thing sa first trimester, one friend namin swore na nakatulong ang pregnancy pillow at fan sa room para sa temperature, pero it took a few weeks before things settled. That said, ang combination ng insomnia, chills, at excessive sweating for 3 days is something worth mentioning sa OB mo sa next visit, just to rule out anything else, better safe na, di ba? In the meantime, try light layers na matanggal mo anytime, stay hydrated, at relax lang kung walang 8-hour sleep, marami sa amin ang natulog lang ng bits and pieces during pregnancy, totally okay yan. Hang in there, mommy, first trimester blues talaga!