Your limiting beliefs about your own worth, not the quality of your work, are why you can't charge higher prices. Confidence that clients are better off with you lets you set any price you feel is fair.
Want to know a secret? The reason most people can't charge more is not because their quality of work or something about what they're doing isn't worth it. It's usually because they have a limiting belief in their head as to why they can't actually charge more. Right? So somebody's charging $5,000 and they are trying to charge $30,000. They are not charging $30,000 simply because they believe they cannot. If you believe you can charge that, you absolutely will be able to charge that. You have to ask, are clients better off with me as opposed to working with someone else? And if you can confidently answer that, then you can charge whatever you want, whatever you feel is fair.
