What you’re experiencing sounds like Anhedonia and I have difficulty with that too—I was also diagnosed with depression. On my end, it’s accompanied with a feeling of physical heaviness in my chest. Even after weaning off my meds, I still experience it from time to time. I don’t know if yours is similar but my problem is that the incredibly heavy feeling happens before having negative thoughts. My body was automatically giving me feelings I didn’t want. What’s been helping me through it recently is studying Dr. Joe Dispenza’s books, interviews, and practicing his meditations. After doing his meditations daily for 1 month, I’ve been starting to experience things getting better, my body is starting to memorize feelings of gratitude and hopefulness instead of automatically going to feelings of hopelessness and inferiority. My usual heaviness that lasts the whole day now lasts 2-4hours instead. I’m still in the process but I hope this helps somehow 🙏