Questions in my head

I always have infinite questions running across each other at a point of time..and they cross so switfly and rapidly that the traffic causes throbbing of nerves..which in simple language is defined as headache.whether i am handling it properly, whether my action will result in a negative effect, whether i am doing justice to my life,my profession,whether things are gonna be fine, whether this is a tough period or there are tougher times to come, whether i am happy, whether i am making others sad, whether my behaviour is decent, whether my conversation makes sense to someone, whether i am looking good etc etc,..so many of them probably no answer or multiple answers..further confusion.
I wonder if everyone has these, how do others deal with such situations in their life, the most complicated aspect of anyone's life is to learn how to manage, nurture relationships. I feel certain relationships automatically fall in place, but others need you to turn upside-down, prove yourself every minute and then complete the job.
I feel i am unable to cope..i have failed many times and now no more trials..
Many agony aunts for this..but no publications.