I've been having a similar problem - my discharge was white and thickish (not clear, slimy/slippery like it should be). There was no smell, but the taste was all wrong - BITTER, SOUR, TART. It was gross and went on for many months. I tried metrondazole (prescribed for BV), and I tried squirting hydrogen peroxide into my vagina, as I had seen some message boards recommend. No avail - the odorless, sour taste remained. It was very gross/embarrassing and I would not let my husband go down on me.
I read last night about baking soda and decided to give it a whirl. Some boards suggested swishing in a bath of baking soda and water but this didn't sound like it would get the solution way up into the problem area enough. So I made a mixture of half baking soda/half water (about a teaspoon of each), poured that into a plastic syringe (no needle of course), laid on my back and squirted the sucker in. It BURNED LIKE HELL. I thought I had made a horrible mistake and splashed cold water on the outside of my vagina to try to stop the burning. It was very painful. I went to bed whimpering and feeling like I had seriously damaged the old Queen Victoria. When I woke up, there was no stinging/burning sensation. Without much hope, I tasted my juices. THE SOUR TASTE WAS GONE!!! I finally, finally tasted like my old, clean, normal self. It's been about 24 hours since the baking soda/water insertion and there is NO SOUR TASTE!!
Ladies, try this out - it's easy and practically free. The only cost is the burning, burning pain you'll feel but that is SO WORTH getting rid of the disgusting, embarrassing sour taste.