I can’t remember the original post, but are you saying you are ordering Modafinil over the internet, without prescription? If you are, you are probably opening yourself up to more risks than just having sent your details to some stranger who was asking. It’s almost certainly not legal, and whatever you are paying for might not even be Modafinil, but something worthless or even harmful. If I’ve misunderstood, and it’s all above board and on prescription, then I apologise, and you needn’t worry. But please don’t fall for any sites that claim to be able to supply prescription drugs without prescription.
As for the banking issue, it might be worth having a word with your bank, and saying that you have accidentally disclosed some banking details, and asking for their advice.
I don’t know what happened to the original post (if anything), but IF it was removed, I assume it was because the so-called Doctor was either requesting or offering something that would be illegal.
I only vaguely remember the post, but do remember thinking it was a bit peculiar. He was asking if anyone knew where to buy Modafinil, and my immediate thought was: “No, but I bet if I say that, you’re going to say you do!” So I guessed he was probably touting, rather than a genuine enquirer, and that’s why he chose to call himself “Dr.”
I do wish I’d posted openly about my concerns, before anyone started PMing him their private details.
I hope the bank can reassure you about how to protect yourself. Perhaps they can be especially vigilant for any unusual usage patterns, over the next few weeks? My bank’s fraud dept, tend to contact me automatically, if they detect spending patterns that appear out of the ordinary, for me. Either amounts, or frequency, or both. Sometimes it’s pretty annoying, because all I’ve done is to settle a number of bills online, in quick succession. They’ve detected this as possible fraud, because it might mean someone has stolen the card, and is spending on it as fast as possible, before it gets stopped.