Hello Madam ,
Welcome to Health Care Magic ,
As per your query pull out method ( Coitus interuptus ) has high failure rate as just before the ejaculate there is a pre-cum that also has sufficient amount of sperms to make someone pregnant , so chances of you getting pregnant cannot be ruled out . As you had said that you had done a pregnancy
test which has come out to be negative , still this will not confirm that you are not pregnant , kindly repeat the test after 1 wk , if it still goes negative lastly to confirm pregnancy is to go for a ultrasound
scan ( PREFERABLY TRANS VAGINAL) . You can visit a gynecologist for further help if required.
Wishing yo all the best