Thanks for your query.
I will try my best to provide you with best possible professional recommendations to your questions.
DNS result in poor drainage of the sinuses, can also be responsible for difficulty in breathing, headaches, bloody noses, or of sleeping disorders such as snoring or sleep apnea. DNS may even be responsible for causing upper respiratory infection
that may cause sore throat
(ants in throat as you are mentioning).
For DNS you need to consult ENT specialist
and follow what doctor says.
repeatative actions as your mentioning points towards Obsessive compulsive disorder
that is an anxiety disorder in which people have unwanted and repeated thoughts, feelings, ideas, sensations, or behaviors that make them feel driven to do something.
This is treated using medicines and therapy.
Antidepressant called a selective serotonin reuptake inhibitor (SSRI) are used.
I advice you to consult psychiatrist
Yet again, I duly appreciate your query to me, I do hope that you have found something helpful and I will be glad to answer any further queries.