Ovulation

So I recently had an early miscarriage last month at 5 weeks-ish. This is my first cycle since the unfortunate event. The month we conceived my ovulation had hit a spike of over 2 and was high for over 12 hours but this month my peak only reached 1.17 and has gone back down quicker. I also ovulated earlier this month at CD 14/15 and last month it was CD 18/19. Is it normal that one month I can hit a peak of over 2 and the next only 1.17? Do the numbers mean anything? Or as long as your line is as dark or darker it means you’ll ovulate? I had cramping last night so I know sometimes happening. Hoping for that rainbow baby this month ✨ 🌈