Cramping 9 days before period

Me and my partner are trying to conserve and this month we choose not to track ovulating thinking it’ll work last month I ovulated in the 10th and on my app it says I ovulated on the 9th and it’s now the 15th and I have been cramping all day it started slight then started to hurt and achy down there 👇. Is this a chance or 🙏🏽🙏🏽

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