Is it depression or wt. Wts happening.

I have been feeling anxiety,fear, short of breath and lonely even in the middle of the crowd sumtimes...also  became scared of being left alone, it's difficult to live alone at a place without any person there with me even at my own home. I start to get various thoughts, feel like crying and sumtimes there's a feeling of extreme pain, the feeling is such that it's difficult to explain n can't be out on words. I have observed that dese symptoms have started since 2010 and since Dan.. I am coping and trying to overcome it but nuthin solved dis problem. I hav taken homeopathic meds bt it seem to help for a duration only untill I was taking it... N I hav also taken psychologist sessions but they don't describe it as depression...but hav given other theories... I want to know wt is it and why is it happening to me and how can I overcome it. Coz it's difficult to live a healthy life having such feelings n I get all lazy and upset of the world out there.kindly help n suggest me wts happening.