After the time consuming process of cycling, I have finally finished cycling my 10 gallon!

I'm rather pleased with myself at the moment. My tank is reading 0 ammonia, 0 nitrite, 5 nitrate (ppm). I am planning to go pick up some tetras to add to the tank on thursday (when the petsmart nearby restocks), I am wondering - can the bacteria survive until then? Or should I dose the tank with ammonia until then? I might add a few shrimp sometime tomorrow - should that be okay in keeping the cycle stable?
Thanks - from a total newbie.