Fiorinal

I have taken it before but not for a over a year or more.  
I have been having odd reactions to dental drugs in the past few years lidocaine with and eventually without epinephrine as it was suspected to be the problem.  I had a reaction in March to just licocaine... the symptoms did not pass when the drug wore off this time.  
I am not sure if this has anything to do with the fiorinal issue or not but am putting out there in case... who knows not me.
I had neurological (and what seems to me vascular ) issues after the lidocaine.
I woke with a severe headache in progress last wk.. made to the doc with the old bottle that held the fiorinal and got a new script this is a new doctor.  The last script was for 15 pills in 2009 so addiction is no my issue or wasn't.  
Now the kicker I have been on antidepressants for years almost 20 by the time I got in trouble and quit them cold turkey.. that is really too long a story.  Lets just say I have had protracted withdrawal for 4+ years while it is nowhere near as debilitating as it once was it is not over either.  
Since quitting the antidepressants I have become hypersensitive to drugs some foods and had a time where light,smells and sound would be unbearable.  I get bout of these things rarely now except for the drugs.  
So this time when I was afraid to take he fiorinal even tho I needed it really needed it. I have a compromised liver F2 liver fibrosis so the less drugs he better.  
So I opened he capsule and took out about half... I took that half and halved it again.. and in the end took 1/4 of a capsule.  It worked...
I have been having problems with a foot and the next day I ended up taking part of the rest of the capsule for that I HAS STRONG CRAVINGS for he rest of it and kept having to reason with myself to take or not take more.  
What is this about?  I don't recall an issue with this medication before and I took such a very small amount...
Could it be that the withdrawal from the antidepressants has some how changed reaction to this med
If anyone can shed some light on this I would appreciate it.  
I take no other drugs except the occasional advil.
Should I take this back to the pharmacy and forget about it?  Opinions are needed and thank you in advance.  
Is there anything else people who use to use fiorinal who quit could recommend for migraines?  Preferably non addictive.  I have tried other things in the past that did not work and have kept this drug as a measure of last resort in the past but now it scares me.  I have had an odd wk with psych issues cropping up anger/aggression out of the blue... a stint where I could not think clearly like in a fog.    I think it is a side effect of that pill I took.
Here is another odd thing since being off the antidepressants I have had sexual nothingness no sex no desire no feeling for most of the years off the drugs and for a good while that I was still taking the Ads.  When I took the fiorianal there was for sure a sexual component to the side effect.  I can't explain it but I actually thought of sex something that has not happened in years...
I am at a loss in understanding this.
Is this making any sense to anyone else? as I am at a loss.