Really itchy pimple looking bump in my vagina

I’m really freaking out 

After having an unprotected sex with this guy I started to itch, which is kind of normal for me (I’m very sensitive) but today I’ve noticed a  pimple  looking bump in my vagina. It’s inside the lips but not inside the hole 

I’m really scared it might be an STD

Please help if somebody knows what is it 

It’s probably clamydia, if it is its curable , go to the doctors and they will give you infection medication , I’ve gone through it and taking the medicine for a week only cured it smile 

It would be wise to go to your GP and get a referral to the sexual health clinic to make sure that it is not a sexually transmitted disease. 

For future reference protection is really important and can save you a lot of embarrassment and fears