I am a 20 year old junior in college, who used cocaine for the first time three months ago. I am worried about the possibility of having permanently damaged my heart from cocaine use. I should probably mention that I am otherwise pretty healthy and my family has no history of heart problems, and also that I have only used cocaine on 5 separate occasions over the course of 3 months. From asking my friends about precisely how much I did, I estimate that in total I have consumed slightly less than a gram of cocaine in my entire life. However, I've read articles about cocaine use which seem to suggest that cocaine in any amount will permanently increase your risk of heart attack or heart disease several-fold for the rest of your life, and that, having tried it even once, I am basically screwed.
I have already decided to never use coke again, but I am wondering if there is anything I can do to reverse the damage that cocaine may have caused my heart? Will my heart tissue heal naturally over time, and if not, then would changing my lifestyle so I always eat right and exercise regularly be sufficient to help my chances?