BBT help! Triphasic chart?

Lily • TTC since 2016 👼21.02.2019 👼09.08.2020 💔💔

I have been temping with AVA so my temps are pretty reliable, because ava chart is a bit curve-less, i input my data onto FertilityFriend. This month they put my crosshairs at CD11 and then changed to CD19. Although it looks strange, i have a feeling it could be the start of a triphasic chart, or LH tried to surge before and then ovulation at Cd19? Very confused, but any advice/ideas/comments would be greatly appreciated!