Is this still depression?

I don’t have bad thoughts about myself but I feel really sad, most of the time it starts for no reason but as I go through the day Hong’s happen that could make it worse or sometimes it gets worse on its own. I know what it’s like to be sad/grief but it’s different. It’s like I can feel it in my heart weighing me down. I don’t feel like talking to people at times and if I distract myself I forget about it but it comes back and sometimes o have slight tremors. I think his is depression but I’m not sure. I’ve had this for 2-3 years but it’s at its worst now. I went to the doctor last year and she said I had signs of mild depression (which I thought I knew already). The shaking is new though. Feeling the weight has just gotten worse with I guess. Am I overreacting or is this depression?