Hi. I'm online and happy to answer your question today.
The most likely cause for the white dot, pain and redness of your eye is a corneal ulcer.
This is a bacterial infection of the actual "meat" of your eyeball (corneal stroma) and requires antibiotic eye drops. I suggest you find an ophthalmologist or, if one is not available in your area, an eye care person or even a regular MD so that you can be examined and started on the correct treatment. I would NOT delay getting this taken care of as, left untreated, it will only get worse.
Does this make sense to you?
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We have been experiencing problems with the chat system for the last few days. Our engineers are working on it. However, I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)