You are nuts to use a larger needle than needed. The larger needle can 'core' out rubber and inject that into you body. The larger needle creates more scarring of the skin and muscle. There will be more bleeding too, much of that will be internal. If you hit a blood vessel, the damage will be greater.
"injected too low"
If you are not mapping out your injection location carefully, you are at risk of getting near or hitting nerves and larger blood vessels. Get a plastic tube or pen cap and standing in sight of a mirror, map out the location carefully and press the the tube to mark the skin. You can swab that area and the target remains clearly marked.
I think that you injected in the wrong area. There can be some severe consequences of sticking a needle in the wrong spot! Injecting should not be Russian Roulette.