Heart rate keeps increasing?

My last cycle my heart rate peaked at ovulation and then dropped. This cycle my jumped at ovulation, dropped one day, and has now climbed. I found a forum online where a woman said her heart rate did the same thing the cycle she got pregnant. Has anyone experienced something like this with resting heart rate over the cycle? I'll post the picture of my chart but I didn't have time to edit it. The blue dot is ovulation, the orange line is resting heart rate, and the grey line is temperature.

My husband's birthday is two days before AF is due. This would be such a good birthday present for him if this does predict pregnancy!