Positive, Then negative...Not sure

So, I took multiple pregnancy tests.

8 dpo - Faintest line on Cheapie

10 dpo - Negative First Response Early detection FMU, later that day I got a faint positive on First Response Rapid Results around 2ish

13 dpo - Negative Firest Response Early Detection FMU, Later around 2ish got another Positive (which was darker than the others) on the First Response Rapid Result

Today, 14 dpo, pink mucousy discharge, Minor Minor Cramps, Period was due tomorrow.

Should I believe these tests ?!