TTC baby 2 after IVF

I'm probably completely wrong...but I feel pregnant. This is my first real cycle after a year of breastfeeding. Baby 1 was conceived via <a href="">IVF</a> after 2 years of TTC and issues with both myself (PCOS) and my husband (low sperm count). App estimates I'm 7dpo. Is this possible? Just feel little twinges and having trouble breathing a lot. I'm probably nuts.