Labour pains not pregnant?

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So I missed my period last month and then this month I was 1 day late which made me around 12dpo on this day I had spotting and for 4 hours what I can only describe as labour pains. I have been in labour 3 times and this was the exact same as those times. I spotted for 1 day then nothing only really sore nipples no more pain no bleeding just sore nipples. Anyone experienced this?