What should i do ? I think i was violated sexually in my sleep

I think i was sexually assaulted in my sleep lastnight. I denied my ex sex he kept asking me i told him No and we went to bed .. I woke up this morning feeling different. How can i know forsure if he did something to me? I think a peice of come came out of my mouth wen i woke up it looked like boogers or snot like consistency.. Also i felt a lil wet down there and my neck was hurting like he trying to have me do oral while i was sleeping then when i left his house he texted me thankyou.. Out the blue im like thankyou for wat?.. Then i called him and said wat do u mean Thank you and he said Thankyou for showing your true colors.. This is the messages he sent