Pregnancy or Missed Period?

Hi everyone! New here! I have two questions. So first one is: I use Glow and Clue. They gave me different ovulation dates, so I dont know exactly which one is correct =\ any guesses? Now, the second. We have been trying and this month my period is late 6 days only (so not excited just yet as it has been in the past and it was nothing), but for the first time I am having a LOT of vaginal muscle spams, would that be normal? Thanks and I am so grateful for this community ❤️🙏