Very confused

Ashley • TTC baby #1 with my fiance since 7/2015. Fighting depression for 5 years. Wish me luck...
Okay I'll make this as short as possible. My period is late. I took a test last night, a day after my period was due, (not fmu) and got a negative. I'm not taking any meds or not under much stress. Has anyone gotten a bfn then bfp after late period?