Question
earlier this year my yard looked good, no or very little weeds.
then the drought hit, no rain for extended periods of time, and
the area I live in was placed under stricy watering restrictions (once a week). Even now we are still under tight watering restrictions (twice a week), but we have had a good amount of rain in the past couple of months. But now my yard is
covered with weeds, many dead spots, many brown spots, and looks
terrible! I have used fertilizer, 10-10-10, weed %26 feed, Scots
bonus S, and even planted (seeded) some 'miracle' grass seed, and to date, nothing, my yard looks terrible! My yard has mostly a
St.Augustine grass, with sandy soil (Florida). I love to work in my yard, but I am in no way, shape, or form an expert. Help, what can I do to recover/repair my yard, without spending a fortune in doing so???!!! Thank You

Answer
It is easy to conclude that the lack of water has been the reason for the lawn to die. But do not overlook the possibility that the same 'dryness' can cause chinch bugs to erupt and complete the destruction.
"Mother Nature hates a vacuum" and when there is a patch of bare ground, She tries to green it up; and Mother Nature has very many plants to to choose from. She calls them plants; we call them weeds. So, if you apply a W&F product to a patch of weeds, do not be surprised if everything dies and the situation appears worse (less green) than before. Additionally, you have applied fertilizer (the significant other in a W&F combo) and that fertilizer is now sitting in the ground just waiting for the next rain to wash it all away into a collection center - a retention pond, lake etc. So now, what do we do?
Assess the situation: Is there enough St. Augustine grass still alive and well to grow out? Or do you have to resod the entire lawn? Bear in mind that you have other options like resodding the really bare areas or plugging the weak parts. If this is the situation, apply "Milorganite" to the whole area and plug or partially sod as you determine. You want growth and that needs fertilizer and water. You need a fertilizer which will not dissolve and wash away, hence "Milorganite" or similar organic product.
Finally, in my experience, there is no miracle product in horticulture. Science and technology give us new and improved products constantly. But each of these work best in the situation they were tested in. It is our responsibility to decide if we have those conditions to use the product to our best advantage.