(Long rant ahead) Actually I don’t really know. If you had a diagnosed depression before and now you have the same symptoms again, then it’s possible. Same symptoms with a smaller intensity as your first depression might show that you are on the verge of spiraling or starting to spiral. But that doesn’t necessarily mean that you are gonna fall into depression for sure (meaning that you are not gonna fall lower than your current state). Maybe your ways of coping with sadness are the same whether you are in depression or not, so it sometimes difficult to tell. So don’t loose hope. Note that some people have life long depression so the main goal for them is to make it livable, not necessarily solve it completely. What matters is not always the label but whether you are able to live relatively normally with your issue and make progress in some aspects of your life. If you think you are falling into depression, try to keep your current stage or to « slowdown » the spiraling by doing positive things for yourself. Try to make your condition bearable enough. So maybe when you have the same problem again, you won’t fall as low into your depression. That way, you can slowly but surely be in a better place. (I am not a therapist though, I just did extensive research. I hope this can help a bit)
