Whether your business is successful or still learning to fly, your constant emotional, cognitive and financial connection to it will bring along stress. Running a business can be tricky, you are not only doing the work you are good at, what you are passionate about, but you also have to market your business, do the accounting, keep up your brand, create client relations… the list goes on.
I want to encourage you to lift some of the burden of running your own business (especially if you are a sole trader) and seek out help and assistance in the back ground workings of your business. This will allow you to get on with what you do best, and focus on doing your work, developing your products and supporting your clients.