Amber feels anxious almost all the time. she finds herself worrying that her husband will leave her (although he has never shown any indication that he would), that she chose the wrong job, that her children might not be safe at their school, and that she might get sick and leave her family in financial ruin. she calls her husband almost everyday to find out when he will be home. she complains to her physician that she is always tired but cannot sleep or relax. amber's most likely diagnosis is