Don't feel ashamed!! You still have the rest of the steps to take... You can do better! Also you can get good LOR's, You can get 90+ in the next exams. You have done your step 1 in your first try which is good.... Also in the interview with the program directors you can excel and you can get residency... It all depends on you... Look at what Asfand said..it is so true!! Many people have not done so well in the exam but they know how to "sell" themselves making program directors wanting them over the person that got the 99..
Give it a try... !!