My eyes are playing tricks on me

Currently 8dpo, and 6 days till my period. I took the cheap Walmart test and thought I saw something. So I took a first response test and definitely see a teeny tiny faint line. In July I believe I had a chemical pregnancy, and the test I took then was just a tad bit darker than today’s. I tested 13dpo during that possible chemical pregnancy. I only have one more Walmart test and one strip test that came with my opk’s. I don’t know if I should take one in the morning or wait to test again on Sunday or Monday. I’m going insane!