Little bumps?

So like I contacted my obgyn about this but I'm like wondering if anyone else has experienced this. Basically so I got my period last Friday and there was no pain or burning sensation while peeing but like on sunday...sis it started to burn and last night I found like this little sensitive bumps near my vagina and one little bitch on my lip of my vag. I had sex last Wednesday but I know the guy and I were clean. Has anyone else experienced this?