Thick white cream and itchy?!

Tigoretta
Ok so my and my bf had some pretty rough sex almost a week ago and it still slightly hurts to pee(stings) amd i have this thick white cream that water diesnt even easily wash away and when i do anything more than sit or sleep it gets super itchhy and i dont know what it is or what ti do...can someone please tell me if i need help? Im worried....