Haah, sakit belakang masa early pregnancy memang common la, tapi kalau sampai tak boleh jalan macam tu better check with your gynae just to be safe, bisa jadi posture issue, bisa jadi something else yang perlu tengok. A few of my mum friends pun ada yang kena first trimester back pain, tapi they improved after physio or just rest lagi banyak, so jangan stress dulu. Meantime, try pakai maternity support belt (ada kat pharmacy), sleep on your side, dan avoid bending, semoga cepat ok, first pregnancy memang challenging!