A warm welcome to the forum sunshine25!
Dealing with mental health issues is definitely a challenge (putting it mildly). We can be taught a number of skills growing up, from tying our shoelaces through to managing money, yet there are areas of skill which are rarely touched on; managing our mental well-being is typically one of them.
Of course, the 1st step in managing our mental well-being involves being conscious of where it's at. Acknowledging there's an issue that needs to be addressed is a good start, as Quirky mentioned. The next step involves asking the question 'How am I going to manage this?' I'm glad you've reached this 2nd stage. You're beginning to managing through support and encouragement, by coming here. I believe the next stage involves self-understanding and the next is perhaps skill development through newfound self-understanding.
Understanding how our brain ticks gives insight regarding our mental abilities and challenges. Understanding how our body ticks gives insight regarding our physical/biological self. If we wish to cover the spiritual aspect, this too gives insight in regard to how we work on a whole other level (our interconnection with the world around us). By the way, some will call this 3rd aspect 'quantum physics'. Whether it's anxiety or depression we are battling with, both conditions impact mind, body and spirit. Depression: Challenging thoughts/beliefs can lead to physical symptoms involving things like lethargy, tears and even nausea in severe cases. As understandable and painful self-focus takes over, there is a sense of disconnection from the world. Anxiety: Challenging thoughts/beliefs can lead to physical symptoms involving increased heart rate, dizziness and nausea. As mental and physical changes take over, there can be an overwhelming sense of disconnection. We are definitely complex creatures with a triad of incredible energies taking place at any given time. Holistic insight is a powerful tool for self-understanding.
I know it may not seem like it at the moment sunshine25 but you are not al all worthless for you are a holistic miracle of energy in a neat little package, known as a human being. Understanding the miracle that you are means unwrapping a gift to the world, that gift being you.
Take care and continue seeking understanding; there is a deeper part of you that craves this