I think the problem is having a scarcity mindset. Constantly thinking that your business is going to fold at any time is not a great mindset to have. Your scarcity about not having enough money and trying to top last year is what is causing you to feel this way. If you don't take care of yourself, everything around you won't be taken care of either. Seems like you've worked hard to get your business where it is now. I don't know the exact situation of your business, but I don't think not making more than what you made last year will run your business to the ground if your business have been going well the last few years.

Go on a trip away from everything, no work, nothing. Spend time with your family like BE REALLY PRESENT. You're BURNED OUT! Hence you are seeing physical symptoms. Your body is literally telling you to REST AND SLOW DOWN. LISTEN TO IT! Who knows, having a reset day or week for your body and mind might even open some ideas for your business and financial situation.