Can I get pregnant on Tri linyah with unprotected sex

Hey guys I have a biggggg question !!!!

So my question is I have been taking these pills for a while now but I have never had unprotected sex because my doctor said I’m on a low dosage. Does that mean I can still get pregnant? I was put on the pills to make my period regular. So I want to know can I get pregnant 🤰 having unprotected sex on the pill ????????????????