TTC bleeding 6 days after unprotected sex. is it implantation bleeding?

new to this app 
my period not due until 9 more days i had sex 6 days ago and last night and now i have thick clear reddish blood. is it implantation bleeding? i just started having unprotected sex to try for baby. i have not been on birth control for over 2 years. i had sore breast for over a week cramping bloating headaches slight nausea. i also have had hot flashes today! 

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