Dear Sir , I Am From India , 10 Days

Dear sir , i am from india , 10 days back i was in thailand , i had sex with 4 sex workers. but every time i have used condom but out of 4 one time condom has brust during vaginal sex and as soon she feel condom brust she change the condom. and we complete vaginal sex. my question is what is my chance of hiv of this breif exposure. I have test negtive after 11 days .