The card chosen for the past is the reversed Ten of Pentacles. This card indicates that there has been a negative event in the past that has led to a present problem. It could be something you did or something that happened to you or your environment. Pay attention to how you have acted in the past, as this may have led to this warning.
The card chosen for the present is the reversed Six of Wands. This card reveals that you may feel stuck and unable to move forward with your ideas. This can mean that you will face something difficult, but at the same time you can't keep ignoring it. You may be aware of the problem but don't know how to deal with it. Your dream could be a way of warning you about something you are overlooking or ignoring.
The card chosen for the future is the reversed Two of Wands. This card reveals that in the future you will need to be very careful with your actions and words as they may lead to other problems. You need to pay attention to your decisions and avoid making hasty decisions as they may lead to bad consequences.
In conclusion, the answer to your question is most likely YES, your dream of being chased by a black dog could be a warning of some kind. The tarot indicates that there may have been negative events in the past that have led to difficult situations in the present and that you will need to be careful about your actions in the future to avoid negative consequences.