Am I pregnant?

Me and my husband have been trying for a baby we had unprotected sex 5 times at the end of august now it's September 11...for the past 8 months I've got my period in January on the 15th the rest of the months it's been on the 9th except for one month it came on the 5th could I be pregnant and should I take a test now or when it's the 16th

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