Hello it's good that you are seeking help. And the problems you are describing suggest having OCD which occurs due to chemical changes in the brain affecting our thoughts mood behavior and judgment. And there is a possibility of having mood symptoms along with it. OCD is a very common disorder and is easily treatable with medications and psychotherapy.

Hi It seems like she is having obsessive compulsive disorder but more probing and history is required She is at a crucial stage and should get recovered fast Consult with me or any psychologist for therapy and counseling

Hello As per your description of symptom.you have described repetitive checking behaviour .there might be other behavioural changes like you described irritability at times .also being under stress and challenging circumstances in life/life events which could worsen these behavioural symptoms.kindly consult a psychiatrist .such patient would greatly benefit from therapy and treatment

I think she is under stress... Encourage her to Consult a psychologist in your city personally for more understanding and clarity.