I am 29 weeks pregnant. baby is lying very low, transverse, and low lying placenta. she moves very erratically, seizure like. is this normal?

Yes: It all sounds normal. The fetus is often in a transverse positions, and actually may change positions frequently this early in pregnancy. Erratic fetal movements are common. Is this your first pregnancy? Sounds like you are worried. Discus all your concerns the doctor following your pregnancy. Relax, drink plenty of fluids, take your prenatal vitamins, and keep all your prenatal visits.