If your period is regular, your cycle is 30 days, your period is 7 days old, and you just had sex without a condom, it is possible and you will not get pregnant. If your period is irregular, it is difficult to say when ovulation occurs, so it is advisable to wear a condom during sex to avoid pregnancy due to poor contraceptive measures. If your period clears in 10 days, and you are ovulating at that time, having sex without a condom may lead to pregnancy. So if you don’t want to have intercourse with a condom, it depends on how many days your period is clean and whether your menstrual cycle is normal, then you can decide if not having a condom may cause pregnancy, mainly depending on your menstrual cycle and the length of time it takes for your period to come.