Chances of possibly being pregnant (tmi)

Okay so last month (April) I got my period on the 9th, my fertile window was from the 21-27, I had symptoms since the beginning of May. I got my "period" may 10th which was 3 days late. It was very short, not wen filling one tampon a day, no blood when I wiped and it only lasted from the 10th to the 11th. I still have all the symptoms, nausea, breast tenderness, headaches, fatigue, dizziness etc. I took a test on Tuesday the 13th and it was negative. Any ladies have any suggestions? I need advice