Your instructor should haved briefed you that in the event you cannot continue the approach, you should go around; you should have practiced this before going solo. At 400 ft an aircraft on approach is not configured to do orbits and ATC should not have requested you to orbit. If it was not ATC, then they should have told you the runway was obstructed by a large helicopter, you do not want to be anywhere near the wake of a SeaKing!