Wee smells like sulphur/eggy

Emily
Sorry guys this is really gross but I need some advice 
So about 2 weeks ago I noticed when I went for a wee its smelt really bad & strong. Like rotten eggs almost. 
I drink at least 2-3 litres a day & I haven't had any alcohol for 3 months so I don't no what's causing it. 
Does any one know? 
Sorry I'm just really worried

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