Do I have an std

Breanna
Okay a couple days ago me and my boyfriend had sex and it hurt so bad like really bad and so I had him take a look to see if it may be swollen or read or something and when he looked there was like skin tag like bumps on the left side above my opening and a little cut at the bottom middle of my opening and if you look inside of the opening then there is this like ball of skin inside and there is some powder like white discharge I'm not sure if it's from me being on depo shot or summers <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> wipes or body was or sex I'm so confused and kind of scared this has never happened before any help?