I think if you can prove you averaged "X" amount in the prior quarter and had offers of "5X" in the period in which you couldn't work, you'd have a fair case that you could have made at least "X" had you not been unable to work.
But ... you're probably going to have to use your "in the pocket" figure, not gross fees. For that you should figure your vehicle expenses as "actual expenses" for gas and oil and not use the standard mileage deduction.
However, you are probably better off getting more in pain and suffering than trying to get much for lost income because the award allocated to lost income may be taxable and medical payments and pain and suffering generally are not.
Time to build a bigger bridge.