That's nuts! I just got an IUD put in a week ago, and they just had me take a preg test at the lab a few hours before. Gotta say, the abstinence thing was no issue, though. (We're cosleeping, and haven't quite found a way to work the lovin' back in.)
I am bf my dd and hadn't gotten my period back yet, but since the IUD, it has arrived. Did the IUD cause it to return???
Sometimes I think gyns are small-minded. This new one I went to was very nice and I liked her manner. But when I said I gave birth at a birth center, and what a lovely experience it was, all she wanted to know was "Did they have drugs available?" (No, that was kind of the point!) and "Did they do continuous fetal monitoring?" (No, so you can labor untethered, and continuous monitoring does not change mother/baby outcomes.) I wanted to wax poetic about my beautiful birth, and she wanted to make sure she could write them off as unresponsible providers. Arggh!
Good luck next time. The IUD is nice for peace of mind, since we can't afford another babe anytime soon. (One income sucks!) Glad to hear your method works so well, too, I should research more on that.