you need to have your anti-lock brake module scanned. You may have set a code when you hit the pothole if the wheel speed changed from what the other three wheels were reading. You may have damaged a wheel speed sensor or wiring.
if you hook up to a scanner you can see what the code is and you can drive the car and watch the wheel speed sensors
to see if one of them isn't working as the others.
when the abs or traction lights come on it means that these systems have seen a code and are now disabled. Normal braking should still be ok. Key word there is "should". I don't know how big that pothole was...