There seems to be lots of possible ways to interpret tarot cards. And it can depend on what it's paired with and where in a reading it is. However, since these are on its own, it's a bit different, I suppose. I know the Nine of Swords can also do with fear of the future, worry and excessive worry, pain from within, potentially being hard on yourself, depression, anxiety, and nightmares. Assuming the little fortune teller was accurate, it may also have to do with you being hard on yourself, your concerns and concerns for the future, any stress you may currently be experiencing, or even just some bad sleep. But, at this point, I think you're the only one who can figure out how accurate it is.
From what I remember from Divination, mine has to do with choices, change and thinking about change, material wealth, time for assessing after working hard, desire to invest in long-term things and that whole planning for the long-term type thing, that the extra effort and work will pay off, future success (that will likely have to be worked toward), that a new level has been reached, and a lot about free will, which I guess can go back to choices and change. That's what I think at least, but my tarot books are still packed, and I've not done any kind of reading in awhile so I could be very off! This is all from memory, and, presumably, for fun.