welcome to healthcare magic
it seems that you are suffering form GENERALIZED ANXIETY DISORDER
which is also an anxiety disorder like panic disorder. Your experiences are not unique; most of patients of GAD feel the same. Like panic disorder it is also treated by antidepressants as sertraline
,escitalopram etc. you mood swings may be related to co existing biploar disorder in which persons has shifts of mood from depression to mania or hypomania. So consult a psychiatrist
, and start treatment. very soon you will be free of symptoms.
best of luck