What type of fertilize have you used? How much per season? Any pre-em applied back in February? I'd get a soil test and go from there. Soil tests are made through you local County Extension Agent for a supporting University. Or you could do one through John Deere Landscape. Anyway, the soil test will tell you what you dirt needs to grow Bermuda. You'll have to fill out that you are testing for Bermuda. Let's get that done. You will probably also need some micronutrients--make sure that the soil test will supply those also.
If you've not put down any pre emergent such as Dimension or Gallery, let's get that done now. However, you've probably missed the window for a lot of weeds and will have to use some herbicides now to rid of all of those weeds.
Do you have any way of applying wet materials?
We all are merely gleaners from the masters who were here before us.