QUOTE
"It ain't gonna happen to me surely."
Famous last words of many a person who thought they were bullet proof.
The fact that you are here on CB is proof that bad things happen to people and that you cannot will things to be how you wish.
The maximum daily dose for valium/diazepam is 40mg. By your statement you are taking more than the maximum at one time by 125% to 175%. You don't say how many additional doses you are taking. I would surmise that you are taking the typical three doses a day. If so, that would have you taking between 150mg - 210mg, or 375% - 525% more than the maximum dose daily. I hope that I am completly wrong about your usage.
Valium is known to be addictive, and difficult to kick. Given the amount you are taking there is a reasonable chance that you are addicted to diazepam.
So, given that you are taking more than the maximum amount in a single dose, given that valium is addictive, given that you have already overdosed intentionally, I would say that your counsultant has good reason to be concerned about your use of the drug.
A doctor who is seriously concerned about OD's will often limit the prescribed amounts, requiring more frequents refills, sometimes to as often as weekly. There are other, safer alternative anxiolytics to valium.
Be sure that you are honest with your doctors and consultants about your medication dosages, usage patterns and mental attitude. If you are feeling the urge to harm yourself tell them. If you are hoarding drugs, dump them down the drain and tell your docs. We all have hard times when urges are awful, but it is pointless to play games with your doctors.
Good luck,
a.m.
Valium PI sheet:
http://www.rocheusa.com/products/valium/tabspi.pdf