Frustration

I feel very unintelligent. In my English 1102 class we have to pick a site and come up with a hypothesis and questions for research. The problem is that I cannot find any scholarly source for the questions I have. It turns out that my professor said that I am supposed to feel this way and that I am doing it right. Every source does not have to be scholarly and that is why I feel dumb as rocks there is so much frustration with this. I honestly thought I needed scholary sources for them all but every question cannot be answered with a scholarly source.