Okay mama, technically pwede pa since wala pang visible bump, pero honestly mas safe na mag-adjust ka na ngayon habang mas madali pa, better to build the habit early kaya pag lumalaki na talaga ang belly, natural na for you na matulog sa side. A few of us tried to wait until later and then napakahirap mag-adjust, so I'd suggest start practicing sleeping on your left side na, mas comfortable pa para sa circulation ng baby. Check with your OB din para sa best advice based sa situation mo specifically, pero generally side sleeping is the way to go sa pregnancy, kahit gaano pa kalaki o kaliit ang bump!