Honeybee, I was just about to toss out an old Cosmo mag I had here and there was an article about 3 women who had the AMH test done and one of them, a 21yo, got a result of 11.3, which is higher than yours, but they went on to talk about that result further and what it meant and the FS they consulted for the story said that the test result could just be faulty and to have it done again, and if the second one came back the same/similar then to investigate with a scan to look at the follicles and test hormone levels - which considering you are still BF could have altered the result (fingers crossed that is all it is). He actually did comment that a result of 11.3 for this 21yo was not really that low when considering that women in their 40's can have levels of 1.0 - 2.0 down to 0.4 and some with even less than 0.4. So maybe this is one of those situations where you should be alert, not alarmed and that when you have it investigated further, things might be OK