getting honest and getting serious is the start you want.
but do not feel ashamed for what you are.
I cannot call you an addict, only you can truly decide that.
but addiction is an illness like any other.
and I am no longer ashamed of calling myself what I am, an addict.

I'm not sure of the pills you were taking.
but Opiates (my choice of drug) and benzos I know that even a "normal" dose, if steady, can trigger addiction.
there are plenty of resources and forms of helps out there.
but interaction with others who have a similar issues or illness is a great help when it comes to addiction.

the feelings you are encountering do sound like withdrawal but again I cannot tell you that is what it is.
all I can say is stay strong, withdrawal is only temporary and so are these feelings you feel now. they will subside with time and patience.

continue to post and I promise to reply, any questions you have, I am here. I am not a doctor but I am an addict. and as it is stated in Narcotics Anonymous... addicts helping addicts is the best cure.