pregnant?

UPDATE: I feel perfectly fine today! Just a little cramping..? PLEASE help
Okay, me and my boyfriend went to the beach this past week and he came in me twice. I don't remember the exact date of the first time but the second time was May 11th. We were there from the 6th-12th if that gives you any idea of when the first time was.  I'm not on birth control, I didn't take a plan B, and I haven't taken a test bc it's too early to tell right now anyways. But I woke up this morning with a sore throat and flu like symptoms. (Body is aching and I just feel fatigued.) i went to a pool party last night and there was nothing wrong with me at all. And I felt perfectly fine all week at the beach. I read online that is a sign of pregnancy. But I think it's too early to be getting symptoms if I was pregnant. I think I could just be getting sick. Please help and lmk if any of you experienced flu like symptoms before finding out you were pregnant.