I did horrible on my GRE even though I studied A LOT. My practice tests I did well, but exam day - uggh. It's like EVERYTHING I studied wasn't on there. I ended up with a 154 Verbal and 147 Quant. My grades are high though, and I have a lot of field experience/volunteer experience and a conference paper. I'm hoping that, as well as my letters of rec make up for my poor test scores.
I have anxiety when it comes to tests like the GRE, and I find that the test itself is unfair. :/ Good luck.