Can I take 2000mg of metronidazole to cure trich?

I tested positive for trich, and the dr gave me a pill to take twice a day for 7 days. I heard that it can be cured with a one time dose of 2000Mg. So can I just take 4 of the 500mg pills instead of taking it the whole 7 days? I started the pills two days ago but I don’t want to keep having to take them.
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