High levels of Prolactin question please help!! Blood test results?

So, I got my blood test results back and tey said I have prolactin in it ( brain signals something about breast milk)...wtf and the thing is I'm not pregnant... back in december I was had some sort of sexuial activity but I DIDN'T HAVE SEX so I should be fine, right? My doctor told me some people have high levels of it, 20- 26 is normal and I got like a 31 and she says it not bad and some people get it from stress and weight gain so could that be the factor. I started eating healthy again and lost weight so would that help?