Need answers about weird aunt flow

Hi! My name is Heidi. My husband and I have ttc for about 2 years now. Working on our first child. Any who, lately for the past two weeks I've been spotting. It's happened four times now. I don't start my period for another week. So it's quite strange for me. I took a pregnancy test, BFN. Maybe it's too soon? Idk. I'm just wondering if anyone has had this issue before? I want to see a doctor but I don't have any insurance and I don't have the money to outright pay for a doctors visit. Any help or advice would be greatly appreciated. Baby dust! 🌟