I think that it is natural to be afraid that the dark times of the past will repeat themselves. But that doesn't mean that it definitely get that bad again. You don't know what will happen, you might have a quicker recovery this time and I do hope that for you
You apologised for being negative.. but here is a good place to post how you are really feeling. It doesn't matter if it is positive, negative or neutral.. it is all okay to feel if that is how you are feeling. I think maybe because of the fear of the past repeating itself you are afraid to feel you sadnesses in case the emotional states bring you into danger. And I have the same fears myself on a regular basis. But the truth is, if we are sad, it is okay to be sad. If we are afraid, it is okay to feel anxious. It isn't nice, but it is allowed. It isn't you being negative, it is just the way you feel. You also bring a lot of positivity here and share so much encouragement with others. We are all a mix of positive and negative and it is all okay because when you look at it all together there is a balance. I enjoy reading your posts whatever they are about because I find your honesty really nice.
I personally think that there is a relationship between the three illnesses: Stress, Anxiety and Depression. But exactly how these things interact with each other can be very different from person to person and depending also on exactly what someone's diagnosis is. Anxiety can be very exhausting to live with and I know that when I get over tired I often have more symptoms of depression.. so that is just one example of how they can be related for me. But everyone is different. I would look at what your instinct is telling you and trust it.. but then maybe also try to talk to the doctor about it when you see them next. Maybe write down anything significant.. I know I would forget things if I had to wait three weeks to say them. And don't be afraid to make an earlier appointment if you feel you need to talk to them sooner.