I am so sorry, I wish I had some insight for you. Has your RE made any suggestions as to what might have happened? I would imagine that they would have told you if there was a problem with your FSH levels. There are alot of protocals being used today for stimulation. Not all work for everyone, but I am sure there is one out there that works for you. FYI, not all cycles are the same. You may not respond one month, but do very well the next.
Keep your chin up and dont get too discouraged. Ask lots of questions when you go back to meet with your RE.