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Hello and thanks for your question.
Most hand sanitizers are alcohol-based and therefore concentrated alcohol was likely a large component of what hit your eye. Alcohol on the cornea usually causes corneal abrasions (scratches); this could explain your symptoms which are consistent with a scratch or an infected scratch (ulcer).
Until you can see the ophthalmologist, I would suggest using preservative-free artificial tears (don't use the kind that says "get-the-red-out" or "redness-reliever"), every hour while you're awake. But I do recommend that you see the ophthalmologist as soon as you can because the chances of infection are considerably greater because of contact lens use.
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My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must see an eye doctor.