Boyfriend problems

So I would say about a month ago me and my boyfriend tried to have sex. It was both of our first times and we didn’t get the far cause it hurt and he only put the tip in after we had a pregnancy scare. I wasn’t pregnant and that scared me straight. Since then I have been turned off by him, I don’t even want him to kiss me or give me oral Or anything.we are long distance and he always talks about when we are going to see eachother again but I kinda don’t want to see him anymore cause the whole pregnancy scare thing. I’m kinda scared to tell him I just need a break cause I want to focus on myself.

How would I tell him?