Are you worried about something, or have you had unsafe sex? Then the best thing to do is to have an STI check-up. If you’re under 25, you’re welcome at a GGD health centre/Sense STI clinic for free and confidential chlamydia and gonorrhoea testing. If necessary, you’ll be tested for other STIs, too.
Do you have casual sex? Make sure you are tested for STIs and HIV at least every 6 months. Are you a man who has sex with men? Get a free vaccination against hepatitis B.