Yes! I had one cycle and I was pregnant! I was shocked! Took my three years to have my son and got pregnant in 3 weeks this time. I was pumping exclusively. I was pumping 4-5 times a day.
I got pregnant around my daughter’s first birthday. I had only had about 3 cycles but I wasn’t regular yet so I didn’t even realize I was pregnant until I was 12 weeks along. I stopped breastfeeding around 31 weeks.