What’s preventing my drill from going though my wall?
A likely possibility you have to be aware of before you up the drilling stakes - you are hitting a steel protective plate that is specifically intended to warn you off of drilling a hole right there, because there are wires or pipes too close to the edge of the stud which you might drill or screw through, causing a larger problem.
Other possibilities depend on what your walls are made of (the above assumes typical wooden studs.) If it's plaster over brick, you might have hit a mortar joint on the &quot;successful&quot; hole. What came out when you drilled the hole? Masonry dust, or wood shavings?