Faint positive and a negative

I was scheduled for my period on October 26- 30. Prior to my husband and I were trying to conceive in the month of October.. had a few symptoms, nothing major. On Oct 25th experienced some light pink discharge (that was new to me) and the day my period was due (26th) I took a pregnancy test got a faint positive and later that day I bled, only bled for 3 days versus my normal 5 days, it was a really light period? If it was a period.... this morning (31st) I took another test but it came back negative. I’m so confuse.. not sure if I should try taking a clear blue or a first response.. the two times I tested I used the 88.cents test from walmart

This test ^^^ was taken on the 26th (the positive)

The test below was taken this morning and I got a negative :(