There is a first time for everything
It’s not uncommon, the reverse really, you get caught up in the moment, probably had one too many Alco pops, and the girl gets prettier by the minute, before you know it you are back at her flat and the inevitable happens. A few days pass and then you begin to get that irritable itch and naturally become concerned, it’s an old story but what do you do if it happens to you?
First and foremost elect to go to an STD testing centre; there will be one near you wherever you are in the UK, plenty of them in London and other major cities such as Birmingham and Manchester for example. Above all do not delay, it may be nothing but the sooner you find out the quicker you can have treatment if it is proved that you have a sexily transmitted disease. The tests can be carried out quickly and are anonymous if you wish with the result brought to you without delay.

Gonig to the doctors or a private STD clinic would be the first job