sorry to hear you didn't pass. i'm still waiting on results, it could be i'm in the same boat, although i felt decent about it when i was done, but maybe i just missed ones i thought i got right! what are you doing to prepare? I put a lot of time into studying, and took a review course. i think the best advice is to just to A LOT of problems. i started studying at the beginning of january, and spent at least 10-15 hours per week studying. it felt worth it when i took the exam. you may need to try a different depth section. just because you may have experience with a subject doesn't mean that it will be the easiest to pass. i work in construction, but was told (and saw from sample probs) that they can ask a lot of random stuff that people who work in the industry wouldn't know. i also tried to steer away from subjects that required a lot of references that i wasn't going to have (such as structural). i ended up taking geotech, and did every sample problem i could find, including all the ones in CERM, 6 minutes, and NCEES sample probs. i learned a lot from doing the sample problems that i didn't know before.
as far as getting an answer, they often anticipate the common errors people will make and have that answer waiting for you