Ammonia smell

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So the past week or so, on and off, my discharge has been smelling like ammonia (I only knew because it smells exactly like what they perm my hair with). I’ve got no discomfort, only the odor and it’s not constant it’s every few days. What’s going on?? I am also ttc and maybe 5days away from aunt Flo if that makes any difference. Help!!! It’s so weird.