Worried about Chemical Preganncy

Megan

I originally thought my period was due one week ago (Thursday). Took a test Saturday using FMU- negative. Took a test yesterday using digital test and it was positive but today using FMU the line is so faint. I feel like this might be a chemical pregnancy or something…or did I ovulate really late this cycle but my husband and I haven’t had sex since 2/25. Thoughts?