Deppression. strange thoughts?

I have been very ill for about 3.5 years now. I have been depressed most of that time with scary thoughts and stuff. You know like common fears like death and just dropping over dead from something or some other common things. But this past year i have been at home with way too much time to think and bad thoughts have slowly crept in. Anyways they are really bad now and I was wondering if anyone could tell me that they've been through the same thing and have come out on the other side happy and living a pretty much happy life. Not perfect but they enjoy they're life. I am obsessively worrying about very wierd and messed up things 24/7 and its gotten really bad. I am already doing things to try and get better. If you comment please don't tell me what your bad thoughts were cuz i really don't need any extra **** to think/worry about. I just want to know if you have been able to completely change your life around and be happy again with rarely thinking about this stuff. I would really appreciate it. Thank you.