Hey Dory,
I was like you, and in fact am still breastfeeding DD at nearly 3. My AF didn't come back til around 16 months after I had her, but then once it was back I fell pg straight away, and was able to keep bfing throughout the pregnancy. In fact taking maxalon for really bad nausea and vomiting actually helped increase my supply whilst I was taking it. In saying that a girl in my mother's group got her AF after a month and she was bfing. so when it's ready your body will let you fall pg again. Until then I guess just enjoy the feeding with your beautiful little girl... but I know what you mean when you say you are ready now. Sometimes I think it's natures way of letting our bodies recuperate etc after the demands of pg.
Good Luck.