I have thought it was up to me to look after me.  I have thought that if I did not look after me, I would not be looked after. . 

All humans have a tendency to doubt. Generally we doubt things we do not know.  . 

There is nothing wrong with being skeptical, unless we are being skeptical of things that actually exist and are true. If  we are skeptical of things that actually exist and are true, the doubt may in itself take us away from receiving what has already been provided. This causes significant problems in society.  If one has to be a skeptic, be a skeptic of what ultimately does not exist and is not true. 

Doubt lack  

Doubt fear

Doubt whatever is not part of who you and Who God Is

Of ourselves we cannot understand what is true, otherwise we already would.  We first need to receive an understanding into what is true.