If it's only been 2 days since your last sexual encounter, the sperm most likely hasn't even reached the egg yet to fertilize it.
It takes approximately 3-5 days for the sperm to travel up the vaginal canal, through the uterus, and up to the fallopian tubes where it meets with the egg. Then it takes approximately another 3-5 days for the fertilized egg to travel back down to the uterus where it implants.
So, with that said, the symptoms you are experiencing are not pregnancy symptoms.
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