First, put out the fires. Next, look for ways to simplify your stack. You're flying solo, so consider SaaS services where you pay a premium for having someone

First, put out the fires. Next, look for ways to simplify your stack. You're flying solo, so consider SaaS services where you pay a premium for having someone else handle the ops. For instance, dodgy email stack: have you tried something like sendgrid? AWS RDS instead of self-managed MySQL? Etc. Finally, can you find a cofounder or another technical person to help? You can literally double your productivity (and more) with the right person; be willing to give up some equity / cash to help the company prosper.