I'm 18 and just lost my virginity a couple of days ago. My cycle is usually around 30 to 31 days, and we had sex on the 19th day of it. We used a condom correctly, but now I'm feeling nauseous and experiencing pain in my lower abdomen and breasts. I'm really worried about the possibility of being pregnant. Can you tell me how I can make sure I'm not pregnant and if these symptoms are typical after having sex?

The symptoms you are experiencing could be related to various factors, including hormonal changes or anxiety. To ensure you do not get pregnant, you can consider taking an emergency contraceptive pill such as "Plan B" or "Ella". These pills are most effective when taken within 72 hours of unprotected intercourse. Additionally, you may want to consider regular contraception methods such as birth control pills, patches, or intrauterine devices (IUDs) for future protection. Regarding your symptoms, nausea and breast tenderness can sometimes occur due to hormonal changes after sex, but they can also be caused by other factors. If these symptoms persist or worsen, it is advisable to consult with a healthcare provider for further evaluation and guidance.