Prolactin levels

Kira

I’m confused about how prolactin levels work in early pregnancy. As far as I know I am not pregnant but 3 weeks ago I started lactating. I’ve had a mammogram that was clear and my prolactin levels came back at 9.9. Pregnancy levels start at 10.0. I’m wondering if I could possibly be pregnant. Does anyone know if prolactin levels rise like HCG levels?