Wasn't that a safe time to go unprotected?

Depending on when exactly you ovulate, that may not have been a safe time at all. Some people ovulate fairly early in their cycles, so for those people – let’s say someone who ovulates on day 10, and had unprotected sex⁠ (sex: Different things people choose to do to actively express or enact sexuality and sexual feelings; often this involves genitals, but not always. ) on day 7 – that would have been a very high risk time.

Please understand that there is no very accurate way of predicting what is and is not a most fertile and least fertile time for you without charting your cervical mucus and basal temperatures. The calendar method alone is often very ineffective. Even when you are charting⁠ (charting: Methods for keeping track of fertility and/or menstrual cycles. ) , natural family planning is not a very reliable birth control⁠ (birth control: Any number of methods people use to intentionally prevent unwanted pregnancy, including the condom, the cervical barrier, the implant, the patch, the pill, the rhythm method, the ring, the shot, the IUD, spermicide and withdrawal.) method for younger women, and if you’re going to use it at all, beyond using it properly, you’ll need to use it combined with another method of birth control. For example, you might use condoms with sex for all times saving your most fertile times, and then when you are most fertile, abstain from intercourse⁠ (intercourse: When people interlock their genitals and move together as feels good to them for the purpose of sexual stimulation and/or reproduction.)  altogether.

Given that you had a high risk, and your period⁠ (period: The fluid – or flow – which contains blood, from the shedding of the uterine lining usually at the end of each menstrual cycle. Sometimes periods may be less fluid and more globby; this is the state that is often mistaken for blood clotting.) is late, it’s time for you to go ahead and take a pregnancy test⁠ (pregnancy test: What we tell you to take when you ask us if you’re pregnant. A test that can be done at home or by a healthcare provider to determine pregnancy. Usually a urine test, a pregnancy test measures for a specific hormone, hCG, only produced with pregnancy.) . You can do that with a home test, or at your local sexual⁠ (sexual: About or relating in some way to sex or sexuality.) healthcare clinic. Too, if you and your partner⁠ (partner: In a sexual context, a person with whom someone is having some kind of sex. The term “partner” can be used for all kinds of relationships, not just serious ones. “Partner” can also mean the person someone is with in a romantic or familial partnership.) have not been practicing all aspects of safer sex⁠ (safer sex: Practices which aim to reduce the risk of sexually transmitted infections, such as use of latex/nonlatex barriers, regular testing for infections and limiting the number of sexual partners.) before this risk – that’s SIX months of monogamy and latex barrier use AND at least two full, negative STI⁠ (STI: Sexually transmitted infections: illness, infection and/or disease which is often or can be transmitted through sexual or other intimate contact, like HIV, Chlamydia or Herpes. Some people call STIs STDs.) screens for BOTH of you – then you and he will need to be sure to get a full STI screening soon as well.

Obviously, you’ll also want to sit down with your partner, too, and make clear that both your ideas about “safe” times and ways to determine what was safe were off. You’ll also want to make clear that from here on out⁠ (out: Short for ‘out of the closet’. When someone’s LGBTQ+ identity is known to other people.) , if you do not want to/are not ready to become pregnant that a reliable method of birth control – such as condoms – is non-negotiable if you’re going to be having sex together, okay?

And if you really are interested in finding out when your fertile times are, I’d highly recommend Toni Weschler’s new book on cycles expressly for young people, Cycle Savvy.