I just made a general confession on Monday with a Society priest. I had concerns about the validly of past confessions and so did the Society priest. That’s why I made a general confession and I confessed this sin. I think I’m just scrupling about it.
Yes, perhaps. But if the Society priest had some questions about past confessions, then you did the right thing. If it were mere scruples, then I'm sure he would have called that out. In the end, trusting your spiritual director (while being completely open) is the best remedy for scruples. If he tells you to let something drop because it's just scruples, then you can safely be at peace letting it drop.