Af symptoms or early signs of pregnancy

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So for the last 4-5 days I have been having slight cramping but today it's been a bit worse kinda like it normally is before af is due, on top of this I have also been having some other symptoms dizziness, slight heartburn (which I never get) feeling sick and feeling a lot more tired than I normally am and aching as well,
My question is are these af symptoms or early signs?