Quite often, young people come to Brook for support about being pregnant and it turns out they haven’t actually had the type of sex that would result in pregnancy.
You can’t get pregnant from things like kissing, touching, or oral sex, only from activities where semen (‘come’), which contains sperm, comes into direct contact with the vagina.
It takes a while for this hormone to build up in the body so there is no point doing a pregnancy test straight after unprotected sex.
If you're 16 or over, you can also buy the Levonorgestrel EC pill from most pharmacies (for around £25), and the ella One EC pill for around £35.
When you go to get the emergency contraceptive pill you will be asked some questions including whether you are taking any other medications, when you had unprotected sex and where you are in your menstrual cycle.
To become pregnant, an egg must be released from your ovaries and then fertilised by sperm.
Every month you release an egg (sometimes two) around 14 days after the first day of your period, or 10-16 days before the start of your next period. Technically, a woman is more likely to become pregnant during ovulation, but it’s impossible to know exactly when you are ovulating because your menstrual cycle can vary each month.
Implantation bleeding happens between 6 to 12 days after ovulation, while a period usually starts 10 to 16 days after ovulation, so it’s easy to mistake one for the other.
The only way to find out for sure if you’re pregnant is by taking a pregnancy test.
Pregnancy tests usually involve weeing on a small plastic stick, or sometimes, weeing into a cup and dipping in a test stick.
The test is looking for the hormone human chorionic gonadotrophin (HCG) which is present in the wee of someone who is pregnant.
Often, the first time someone thinks they might be pregnant is when their period is late.