Pregnant before period? 3 months post-partum

Mimi • Baby boy born in April 2020 👶🏼 loss in 2021 👼🏼 rainbow baby coming in 2022 🌈

I’m 3 months post-partum and worried that I might be pregnant again. About 10 days ago my husband and I had unprotected sex and now my nipples are sore… I haven’t had a period yet since giving birth so I’m wondering if it’s possible that I’m pregnant or if this might just be a sign that my period is finally coming back. Has anyone else on this app gotten pregnant before their period even came back?