Hi sis, yes there's a chance kasi if the condom broke or nag-leak, sperm can still reach the egg, kahit nasa entrance lang ng vagina. The safest thing is to talk to your OB or go to a clinic as soon as possible, kaya they can give you emergency contraception if needed (yung Plan B type) which is way more effective within 72 hours. A few of us mums have been through condom scares too, and honestly better to be sure than worry for weeks na! Keep safe always, and don't hesitate to reach out to a healthcare provider immediately.