I designed a model for my dissertation which has 7 predictors based on existing theories. After data selection, I got a sample size of 126 and I thought I was okay since the data is cross sectional. After running the regression I obtained the following result:
As you can see (i) the $R^2$ is -3.3% and p value for F test is .86 so I'm worried about the sample size being too small. (ii) all the coefficient has very large p value.
I can't find more samples as the available data is very limited and I don't have enough time to resign the dissertation. How should I interpret this result? Will conducting a failed experiment lead to a problem with the dissertation?