Please feedback😩😩😩😩😣😣😣

As much as it may seem embarrassing last night I had sex with my boy friend of 3 years we always have sexual Intercourse without protection however I have been on my period I am irregular as well so lately I been having anal well last night we had sex since I got off my period and I felt this ugly pain I couldn't bare these past couple of days my vagina has been bothering me I been having this itchy feeling and as if I have a object that has been bothering me ...today after sex it hasn't been bothering me can someone please provide me feedback should I get over the counter medication ? What do you ladies think this might be ?