OPK question

Brandi • My name is Brandi and my fiancé`s name is Joe. I`m 23 he`s 25. TTC baby #1. I`m a hair stylist and he`s in flooring.
How long does your LH surge usually last? Mine only last barely 24 hrs.. Is that normal?? I did have some twingey like cramps on my left side that felt like ovulation..

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