The sort of muscle movement you describe is a
normalNormal saline flush event during
RapidRapid shallow breathing Eye Movement (REM) sleep and poses no cause for worry. Likewise, the sort of quick jerking of a muscle (often a leg muscle), called
myoclonusRestless leg syndrome, that occurs sometimes as people are falling asleep is normal and not a sign of underlying neurological disorder. Headaches and GI complaints are common somatic complaints among children, and you will probably be safe at this point treating them in an off-hand fashion with your daughter. By off-hand I do not mean making light of them, but rather not making much of an issue about them either. You have noticed the correlation of the symptoms with certain states or events, and this indicates that you are safe to not worry about them. Relative to the car rides, brief stops for some fresh air can be useful. Car sickness, even without actually vomiting, can sure make car rides an unpleasant experience.
as for the headaches, so far (thank God) she seems fine between complaints. no missed school or activities. and a lot of the time we can predict when she will complain. and then the next minute she is fine.
thanks again!