Sakit pinggang memang common dalam pregnancy, terutama masa first trimester sebab hormones relax ligaments kat belakang kita, tapi kalau sampai sakit sangat sampai susah nak gerak, better check dengan doctor or midwife sebab kena rule out kalau ada stretching issue or posture problem yang perlu attended to. A few of my mum friends also complained about back pain early on, but dorang settle pasal they adjusted how they sleep (side position dengan pillow between knees helps!) and avoided heavy lifting, but yours sounds like it's affecting you quite a bit, so doc can give you proper guidance and maybe suggest physio or safe stretches for pregnancy.