Assuming this was a valid priest, unless you INTENTIONALLY hid or distorted something, the Confession was valid. Just try to rectify the situation at your next Confession. "Father, during my last Confession, I made a general. I said that .... but what I really meant to get across was .... I didn't misstate this intentionally."
Not a big deal. I've done this regularly, where I forgot something and then added it in the next Confession. Unless you FULLY DELIBERATELY intended to obscure something. Now, that's where the issue of scrupulosity really rears its ugly head. You start to question yourself whether it was "deliberate" where any movement of the mind, any idle thought that pops into your head, gets conflated with an act of the will.
If you're genuinely scrupulous, the advice of my own Confessor at seminary would apply. He instantly cured me of scruples by basically commanding me to not confess anything as mortal sin unless I could basically swear to God that it WAS in fact a mortal sin. I believe the system of "probabilism" serves the scrupulous very well (though it would be a huge mistake to allow the lax to apply it, IMO). St. Alphonsus taught a probabilistic system, but then modified it a little bit later (after taking some criticism) into more of a semi-probabilist opinion. But what's ironic is that probabilism is probable, so it's not generally forbidden to use the system :-)
This is absolutely sterling advice.
I can well foresee that scrupulosity could be the "occupational hazard" of trying to live by traditional Catholic moral teachings, especially for young people (and it would usually be young men, due to their powerful urge to violate the Sixth and Ninth Commandments, something that is hard-coded into the human nature of the male uninformed by Divine Grace).
I noted this recently in another thread, but in their misdirected zeal to reclaim and re-appropriate the Catholic Faith whole and entire (as they see it), sometimes "conservative Novus Ordo" people get it wrong and go totally off the deep end. They are the kind who, if you even so much as
appear to question anything about Vatican II or the Novus Ordo Mass --- because they've been taught that everything connected to V2/NOM fell straight from heaven by the positive will of the Holy Ghost (they would say "Spirit") --- they will look at you like you've just slapped them. (We call them "Catholic holy rollers" in our home.) One of them recently said online, that any fully deliberate violation of any one of the Ten Commandments is a "grave" sin, therefore mortal if committed with sufficient reflection and full consent of the will. Not that this is ever to be condoned, but such things as small "white" lies, pilfering more condiments from a restaurant bar than you're entitled to, and snippy remarks made to others out of exasperation, simply do not rise to the level of mortal sin. People such as this are headed for an emotional and psychological plane crash, out of drawing false conclusions that they do not have the catechetical training, and possibly not even the intellectual acuмen, to avoid.