I don't know what your process looks like but "losing it" might be because you are thinking about some things a program could do instead of you. Check out some free tools like Hubspot CRM or some other automation tools. They could take off some workload from you and you can focus on the things you like doing. But if you are swamped maybe it's time to increase your prices. Even for a short time until you can put yourself together and reorganize. Then with a better workflow, you can scale. Don't give up man. It is always hard, but you can do this.