Need help

Kendra

I had unprepared sex with my guy friend on the 14th and the 17th of last month and then had unprepared sex again on the 19th with a old friend of last month now I am pregnant they said I am 5weeks and 1day that means my conseption date is on the 24th of last month my lasts period started on the 10th of last month I am just confused could my conseption date be wrong