Preseed impact on BBT?

We have been using Preseed this month, for the first time. Can using Preseed have an impact on BBT charts or ovulation?

I usually have textbook charts with ovulation on CD14 followed by a big temp spike, but this cycle’s chart is confusing me. Could it be influenced by Preseed?

To compare, here are my current chart (blue) and last cycle chart (yellow)