Pregnant while breastfeeding?

My baby is almost 9 months now and I'm breastfeeding. Before baby, I had really predictable 28 day cycles and we got pregnant on the first try. On April 2nd I got my first period since baby. Over a month later and I'm still waiting on AF and I've had a million BFNs. Anyone else have experience? Is your cycle kinda wonky when it first returns?