AF question!!

🌻sunrisesunset • Mommy to two beautiful daughters 💓💓| PCOS | 29 | TTC #3
I had my baby girl 01/23/2017, I had PP bleeding for 10 weeks and AF showed up on April 6-April 15th. It's now May 23rd and nothing. I do not breastfeed, she is formula fed. Is this normal?!