You’re very welcome @SingingWitch! 
I’ve thought about your question for a bit, and I just want to clarify- the cards you mention are Tarot cards (and not Oracle cards), yes? If so, you’re not alone- I personally have had a very hard time getting my tarot decks to commit to yes/no questions. They guide me well and tell me what I need to hear (not always what I want to hear haha), but they really struggle with yes/no questions.
As I’ve learned more about the tarot, I’ve found that actually many (but not all) Tarot guides suggest that Tarot may not be the best tool for getting a yes/no response. This is because tarot is strong when it comes to symbolism (lots and lots and lots of symbolism!). From what I’ve found in my own studies, the symbols in tarot are best suited for giving advice- they offer suggestions, insights, and ways around problems. Working with tarot is like handling stories- it is extremely hard to squeeze a story into a one-word response.
Perhaps your cards were trying to tell you something more complex and just couldn’t communicate through a yes/no reading? You could try rewording the question to be more digestible by tarot.
Instead of yes/no questions that tarot may struggle to answer, you could ask:
- What will be the outcome of my spell?
- How will this spell affect the one whom it was cast for?
- What could I have done better with my casting?
- What can I expect will happen as a result of this spell?
Otherwise, you could try another form of divination. Tarot likes to give long, detailed answers, but other forms (such as Pendulums or Ouija Boards) are totally fine with yes/no questions!
If, however, your Tarot gave a correct no response meaning that your spell did, in fact, not work- then I would suggest looking back over what you did to see if there was anything that went wrong. There is a really helpful guide here called Recasting Spells- Should you do it? That talks about what may have happened.
I hope that was helpful for you, SingingWitch, and I’m sure others will have some great advice for you to consider as well!
Blessed be 