I just feel really disgusting right now. 

I was just walking outside, like I normally do in the evenings and suddenly a guy came up to me and asked if he could walk with me, and me being me, couldn't say anything but yes and we started talking. He was quite nice even though he made me feel a little bit uncomfortable. So he walked me home and then he just kissed me and honestly, I've never been so scared before. The fact that he didn't want to stop made me feel even more scared and I had to really push him away. Before this kiss thing happened he asked if we could meet up tomorrow and I didn't dare to say anything else but yes, since he's supposed to go back tomorrow or on Saturday. I really don't dare to. I'm afraid he's going to do something again and I honestly can't take it. 
I used to harm my own body and it usually helped but this time I couldn't scratch the awful feeling away. I just want it to go away. I feel so disgusting and I don't know how many times I almost threw up already and it's only been 1½h since it all happened. 
Is there anything you can do to get this away?