it is a rooted brug, keep it semi moist, not wet.. give it a little supper, I feed mine tomatoe food, lots of sunlight, the more you ignore it the more it will grow, you should see a green peek of some tips soon.. is the stem still firm? gently squeeze it to see.. if you can tug it gently and it won't give, the roots are still there... I have had completely shriveled sticks turn into this:
