I think I might be pregnant..What should I do???

I missed my period for May. My breast are a little bit bigger and I'm kinda tired. But I just started a new job. And I'm terrified to take a test. I'm a college athlete and my parents would flip because I'm supposed to be the good one. And I haven't told my boyfriend yet. I'm not sure what I would do if the test came back positive. I asked my bf what he would do if this happened and he said he would be supportive after he got over being mad at himself. But I don't know that he will believe me.

Should I tell my boyfriend before or after I take the test?

What should I do if it's positive?