Faint? Indent? or Evaporation line?

Ttc. Last period ko po is april 13-16. Nag brown spot ako May 1-5. Expected period ko is May 17. Until now wala pa din po akong period. Lagi akong bloated, super sore breast at bigat masakit balakang cramps sa tyan. Nag test ako last Wednesday ito lumabas after 1 minute, at first akala ko fault lang yung strip kaya inulit ko after a minute ganun ulit. Mag test ulit ako next week baka lang po may naka experience ng ganito. Thank you ?