If penis enters vagina, even if the hymen is intact, even if the penis tip is the only thing that enters, yes, you can get pregnant. The so called "virgin" birth isn't just a bible story. It happens. I also hate to burst your bubble, but even if your hymen is intact, if his penis has entered any part of your body, even a little bit, you're not a virgin.
Having said that, you need to wait until your next period. If you miss it wait a week and than test using first morning urine. If that test is negative wait another week or two and test again if you still haven't gotten your period. If that test is negative wait until your next period after that and test again or see a doctor for a more accurate blood test.
If you want to lower the risk of pregnancy than use at least 2 forms of birth control. If you want to obliterate any possibility of pregnancy than abstain from sex, which means no penis anywhere near the vagina.
Good luck.
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