Can past drug use be effecting my health now?

I am an ex-drug user. I have been clean for well over a year now but I have a solid 10 years of heavy drug use in my past. I abused stimulants like cocaine and meth everyday and since I have been clean I get bouts of anxiety, increased pulse rate, and memory loss. It seems these symptoms appear randomly. Are these effects of the drug use? And is there anything I can do for it? Maybe a holistic remedy?