Tic,
It could be an easy fix. The two blind cords you see on either side of the blind need to have tension. You should see a small round disc that can be turned to tighten cord. Not too tight. Tension needs to be as equal as possible on each shade. Also, do not let go of the cord. The plastic disc may be broken and can be rerplaced. Any shade or RV shop should have them. If not, use a sewing machine bobber.
Dennis