Just recently my doctor prescribed Augmentin for me, and two days later I woke up and saw that my two front teeth are discolored

On the bottom half of my two front teeth, they are
extremely white, but then on the top half they are a normal color. I have tried brushing them and using mouthwash and everything. I'm beginning to wonder if my teeth will ever be back to their normal color. I'm also not sure if this is a side effect from the Augmentin. Is this very common? I have tried searching on the internet, but I have been unable to find anything similar to what I have.
Could someone please tell me what I should do about this? Should I see my doctor or my dentist? Will my teeth stay like that permanently?