not improving but getting worse

i'm getting pretty distressed because it seems like the more studying/practice i do, the more questions i get wrong. i got a great score on my first practice test, but i was right up against the timer on each section, and it felt like i was wasting time doubting my answers. since then i've been trying to be more confident in my answers and move more quickly, but then i keep falling for trap answers. my second practice test was abysmal even though i felt like i did great. now my confidence is shot and i'm spending an inordinate amount of time on each question. does anyone else have this same experience and have any advice on the confidence/time management tradeoff?