Scrupulosity: asking your priest once is fine, twice is not
Clergy are the right people to ask about your obligations. The problem is what happens next: the answer settles you for a day, and then you are back with a reworded version of the question.
It seems like the obvious place to go. If the question is about sin, prayer, blasphemy or belief, surely the person to ask is the one qualified in your tradition. And they are, and I want to say that clearly before I say the other thing. For scrupulosity, asking is where the trouble usually starts.
Ask once
By all means ask. If you genuinely do not know what your tradition requires of you on a particular point, the right thing is to find out, from someone who knows. A clear answer from inside your faith is exactly the kind of information you need, and I am not the person to give it. I do not share your beliefs, I do not need to in order to treat this, and where the line between your real obligations and what the OCD has added is not mine to draw, we get it drawn by someone qualified rather than guessing in the room.
What usually happens next
The answer is clear. It settles you. For a day, perhaps two, the question is closed.
Then the doubt finds a gap. Did I describe it accurately? Did they understand what I actually did? Would the answer be different if they knew about the other thing? What about the slightly different case that occurred to me on the way home? And you are back, with a reworded version of the question, needing the answer again.
At this point the clergy have become your reassurance source. Every time you ask, the relief is real and brief, and the doubt returns reformulated. This is unfair to them, because they are being asked to perform your compulsion for you. And it makes the OCD worse, because every answer teaches your brain that the question was serious enough to need settling, so the next one arrives louder. Many clergy recognise this and will say so, sometimes quite firmly. Some will tell you they will not answer the same question again, and they are right.
Why the answer cannot hold
The reason a clear ruling does not settle scrupulosity is the reason no reassurance ever settles OCD. The doubt wants certainty rather than information, and certainty about your standing before God, or about whether you truly meant a thought, or about whether a ritual was performed correctly enough, is not something any human answer can supply. The ruling addresses the question, while the doubt is about the intolerable possibility underneath it, that you have done something unforgivable, or that you are not who you have spent your life trying to be. No amount of theology closes that, because it was never a theological problem.
The same trap with rulings and texts
Searching for a ruling that settles it, and finding three, and now having a new question, is the same compulsion in written form. So is re-reading the passage, checking the commentary, and comparing traditions. Each search feels like diligence and functions as reassurance-seeking, and each leaves you with more to check than you started with.
What treatment does with the questions
In CBT with exposure and response prevention for scrupulosity, we withdraw the reassurance-seeking gradually and by agreement, and let the questions stand unanswered. The questions matter; answering them is what keeps them open. The doubt rises, and then, given no ruling to feed on, it falls, and you discover that you can pray, or sit in the service, without the question being resolved first, which is what everyone in your tradition is doing whether they know it or not.
Where it helps and you want it, I work alongside your priest, minister, rabbi or imam, so that the message from inside the tradition and the message from the therapy line up: you are not required to keep answering this. A clear statement of that from someone you trust in your faith can be worth several sessions.
What you get back
A faith you can practise rather than one you are being interrogated by. People generally finish this treatment more settled in their tradition, not less. If you have worn out the patience of someone whose job is patience, there is more on how I treat religious and moral OCD, and the asking is one of the first compulsions we work on.