The easiest way to ease your mind is to have the blood test it's simple and you will know for sure.
What was the nature of your drug use? If you used IV drugs and shared needles you placed yourself at risk of contracting Hepatitis C. Likewise if you snorted any drugs using shared straws (or whatever) you placed yourself at risk.
Ask you doctor to do some bloodwork, a liver panel plus test for Hep C.
Good luck. Please post again and let us know what they find.
Per Wikipedia:
Piracetam (brand name: Nootropil, Qropi, Myocalm, Dinagen, Synaptine) is a nootropic. It is a dietary supplement which is claimed to enhance cognition and memory, slow down brain aging, increase blood flow and oxygen to the brain, aid stroke recovery, and improve Alzheimer's, Down syndrome, dementia, and dyslexia, among others.[1] Piracetam's chemical name is 2-oxo-1-pyrrolidine acetamide; it shares the same 2-oxo-pyrrolidone base structure with 2-oxo-pyrrolidine carboxylic acid (pyroglutamate). Piracetam is a cyclic derivative of GABA. It is one of the racetams. Piracetam is prescribed by doctors for some conditions, mainly myoclonus,1 but is used off-label for a much wider range of applications. However, some treat it as a food supplement rather than a drug.[citation needed]
Interesting --- perhaps I should be taking this... LOL!
Have you been diagnosed with Hepatitis C?
Because I see nothing in your list of symptoms that screams HepC...
I do see risk factors that COULD cause HepC - but no distinct reason for HepC suspicion...
Did you have high blood tests? (Liver tests?)
Or something?