Well, if that creature didn't looked like an actual animal, then might be just a dream that you had. But some animal spirits don't look like their normal species, for example, you might had a purple or red owl as an animal spirit, but they doesn't even exist.
Also I noticed that you say that looked like a digimon. I have three suggestions.
1. It was just a normal dream without a real meaning.
2. It might be a type of spirit guide that took that form because you liked it and tried to contact you.
3. It was a demon nearby or passing by and just entered to you mind, looked into your mind and saw that form. Then tried to fool you with that form.
All the three seem to be reasonable for me.