Had unprocted sex the 6,7,9,10,11 took a pregancy test today came out negative period left the 29th of january , not pregant. ?? sprem when in me

Dates unclear: If you had sex on 6-11 January and had period on Jan 29, then you are not pregnant. Sperm does not last more than 5 days or so, therefore you do not need to worry about the sperm from Jan 11. If you had sex on Feb 6-11, it is too soon to know if you are pregnant. Do a pregnancy test if you miss a period. If you do not want to be pregnant, use contraception all the time, every time. Have safe sex.