Blended

I got my hair highlighted yesterday. And today I'm trying to think of ways to fix it. I have only had my hair professionally highlighted one other time in my life (about eight years ago), and it basically just brightened up my natural color. As of today, I have my normal hair color (sort of a medium brown) interspersed with pale, pale blond streaks. I have absolutely no problem with this look--if it suits a person. It absolutely doesn't suit me.

The colorist asked me if I'd like the highlighting to stand out/be obvious (or some similar wording) or if I'd like it to blend. I remember that word specifically. I emphatically said, I'd like it to blend. By that I meant I'd like it to marry with my hair color. When I looked in the mirror for the first time, I saw these platinum strands scattered all over my head. How is that blending??? Using a food metaphor, I'd say I ordered salsa and got pico de gallo instead. And I have no idea what would be best to fix this. I'm wondering about a toner (recommended by my hair stylist), but I worry that'll lighten everything up too much and I'll be a blonde. I'm wondering about colored shampoos, but then question whether that'll undo the highlights completely. I'm at a loss, and it's making me very nervous.

I have only a week to figure this out, so if anyone has any ideas...I'd LOVE to hear them. If necessary, I could post a picture.