Sweetheart the last thing your mum wants to here is that someone said on the internet that you may have caught warts or something.
Its time you said mum, we need to talk, you must tell her first up that you have not had sex, I am asumming this is what you have said, but you have had what you would call foreplay, and you now have this problem, just what you have told us, make sure you talk to her when it is quite and make her a cuppa, suggust a cig if she smokes, then she will be getting ready in her mind for the talk. Do not leave it to long..A mother knows things, but sometimes they work and seem not interested at night time, so choose a moment on the weekend, when you can talk.
good luck, whileyou are at the doctor, you should get the pill, nota period pill, just in case, foreplay leads to sex, but alsomake the guywere a condom, you are young, be wise now, condoms, condoms.