Mine is also higher in the evening. One thing my doctor and I discussed was changing around when I take my medication or spreading out the dosing throughout the day. We haven't made any adjustments yet, but that was one idea we floated around should things become more consistently high in the evenings. I wonder if that is something that might help? I also try to take it most easy during those times of the day when I know it is highest (for me around 3ish and 9ish).
2008-Our Baby Girl, PTL born too early at 30w6d, Fought so hard... Forever Loved & Missed
2010- Lil' Bro, Pre-E at 29 weeks... Induced at 36w6d, Born 37w
2012- Lil' Sis, Super-imposed pre-e at 25 weeks, PTL & GD at 35 weeks, Evicted 36w