Could I be pregnant? I’m 29 days late and I’m always on time. I got a faint line.

I just turned 20. I took a pregnant test last week it was negative. I have always had normal periods never late! 7 days later still no PMS signs so I took another one and it had a faint line. I had unprotected sex in May, any June. I’m having headaches, nauseated, heartburn, Diarrhea, dizzy, very tired, light cramps in my abdomen, and lower back.