I notice some tiny tiny white/gray spiders on my ceiling.? There were about 10-15 on my ceiling. They're really small but...

There were about 10-15 on my ceiling. They're really small but I can`t bear insects. I killed most of them. Is there a nest in the neighbourhood? How do I get rid of these guys for good?
Answers:    I don't know where on earth you live so I'm not sure but black widow babies have white bodies. Have you seen the big white bubble that the female black widow takes comfort of until it hatches? Out of that comes hundreds of tiny little white spiders.

Fumigate