I don’t think you need to worry (and certainly don’t need to be apologising) about not engaging with anyone else. If nothing else, you have a sympathetic audience here and we are all likely to understand something of how you’re feeling.
Do you always see the same doctor? Is there a way you can see another at your practice? If you’re not happy with the care you’re receiving then there should be a way of changing who you see.
And being fixated on what people see to you, particularly medical professionals, say to you about your depression isn’t unusual. I always get pissed off when someone describes my depression as ‘mild’. It feels as though I’m being ridiculous for struggling through every single day as if I’ve got a mild cold, rather than a debilitating mental illness.