You need to stay calm and focused and hopefully you have a macro Expander which can help alot.
Obviously experience is not what you are lacking. You need to find balance in your life with good diet, exercise, proper rest and perhaps take some herbal supplements also.
If you are making grammatical errors that can be easily corrected. Don't feel bad about making less money as you are not alone. I am sure most of us are in that situation. No one is having an easy time these days.
I would say stick with MT it. You know it, you've done it for years and now you need to take it up a notch and hone your skills a little better.
You really have an edge over a lot of new MTs with no experience.