Sorry your having such a time with your pain. Optimal would have been for her to change your fent to 48hr change but she oopted instead to go for low dose b/t.
However you decided the dose was not doing anything and took 3 times the amount she ordered. I would not do that again and I would not tell her you did. I would call her asap and tell her that the 5mgs absolutely made no change in your pain levels. At this point she can do several things,up your b/t,change your 72hr to 48hr fent or nothing at all.
As Jim said this is a big no no with most PM docs and violates contracts which to them is unforgivable offense. I have been with my current Neuro for 5 years and he would certainly "kick me to the curb" the 1st time.
Good Drs are so so hard to find when treating CPrs you cannot afford to lose too many.
Some of us have been around these forums long enough to have seen this happen time and time again, not trying to be hard here and certainly understand hurting and having a means to stop it and how frustrating it is to not be able to use. Doing so can have consequences alot of us cant afford.
Please call as soon as you can and hope your pain levels out soon.