I had severe clinical depression for years prior to the major onset of my anxiety disorder, probably about 7 years at least. A lot of stuff happened, which effected me profoundly.
I experienced 3 huge deaths: my mom (she died of cancer, and it was hard seeing her getting weaker every day), my grandpas on my mom's and dad's side, and my grandma on my dad's side. My dad lost his job and fell into severe credit card debt so he lost his house and had to move into an apartment, which my fiance and myself were forced to pay for due to my dad's financial situation. This stuff added kindle to the fire.
When I first started having panic attacks and health anxiety, it was an occasional thing. I even remember overthinking health when I was like 9 years old (I am 23 now), but it got to the point where overthinking about it took over my life and I began to frame the way I lived inside this little bubble of anxiety, rather than pursuing stuff I wanted to do. This in turn caused me to overthink other parts of my life, other scenarios, and I basically turned myself into a highly strung type A personality who managed to maintain a strong, confident outer self, while being a complete mess inside. I've had generalized anxiety for almost as long as my depression, and near-crippling health anxiety for about 3 years or so; although it got very bad and unbearable two years ago, and stayed like that until the present.
I've been on numerous antidepressants to try to combat my depression / anxiety: Cipalex, Citalopram, Remeron, Ativan, and Zopiclone (for sleep). Been off of pills for over a year now because I didn't like the side effects. Weaning off of these drugs was difficult as heck to do, lol. They weren't lying when they say "slowly taper off antidepressants".
Been having a lot of luck with Cognitive Behavioral Therapy, and it makes up the crux of my treatment plan at the moment. Just trying to stay occupied so that the mind has something else to think about other than negative emotions, fears, and sadness.
It's horrible to have to go through any of this suffering but once you get past it, it will feel like you are a master of yourself and your future. I am still trying to improve but I know that getting better is the only way forward, so I try not to relapse into old habits.