LH blood test levels help

Fiza

Hi. I did LH blood test on cd 13. Level were 11.76. Then today I went for another test on cd 15 . Levels are 10.68 now.

I am confused. Do Lh levels fluctuate before ovulation? Or I already have ovulated? Last night and Today I was having mild cramps in my left ovary . I have 33 days average cycle length. SORRY for my bad english