The danger of the inside of the thigh is potentially hitting blood vessels, nerves, and softer tissue. It is going to be more like a subcutaneous injection than a intramuscular one, you’ll probably have your levels a little wonky as a result. If you start to feel really sick/dizzy/lightheaded it might be worth double checking that you didn’t hit something.

If the vial doesn’t look cloudy or discolored it might still be ok, the carrier oil is pretty stable. It might have lost some potency, but it isn’t guaranteed to have gone bad