7dp FET - concentrated pain in left side

Jen • Welcomed 👶🏻 2/26/2018 🙌🏼☺️ Unexplained infertility 👩🏻‍🔬 Me: 32 DH: 33 👨🏻‍🔬 3 failed IUIs, 1 PGS FET 6/2/17 - BFP ➡️ Baby Boy!!! 🙌🏼
I had my FET of a 5d blastocyst last week. I have been having a building pain in my left lower abodomen. It's very uncomfortable. I commonly get AF cramps but they are usually not localized to a specific side. Does anyone know if progesterone suppositories alone would cause this? Or could this be a sign my embie is burrowing and growing?