I'm so anxious and have OCD-like obsessions (very disturbing)... Help?

For some reason I keep thinking that all men want is sex. Everytime I go out on the street I assume every man (young and old) wants to rape me if he just looks at me. For some reason I assume that fathers don't really love their children, they just want sex and just want to cheat on their wives. I'm so f**king lost. I'm scared my boyfriend will cheat on me. I feel like I'm getting judged if someone looks at me. I feel so out of the loop, so socially awkward and I feel different from everyone. I feel ugly and self-conscious 100% of the time. I feel like every guy who looks at me wants to have sex with me. I have many unwanted sexual thoughts that come into my head, some unfortunately involving relatives and people I know. It's disgusting and disturbing but I don't know how to control them. Please help me!!! I feel so anxious and I have so much tension inside of me mentally. How can I f**king control these awful thoughts?