I am new to gardening and have planted my first veggie garden this year. My question is about my Beefmaster tomato plant. I have my first bud on the plant, but it has turned yellow. Does this mean that it is going to fall off? A couple of days ago I forgot that I had turned on my soaker hose, and ended up flooding my garden. Did this shock my plants?

I have other plants in the garden as well, and the green beans seem to be doing great, but I'm not getting much growth on anything. Did I kill all my plants in less than a month of having them in the ground???

Here is a link that might be useful: