faint line?! some back story

Tmi but...yesterday morning  after I used the restroom there was like a light brown discharge, like you got before you start your period. After I got home yesterday evening it was there again but it was darker & way more of it. Then I started cramping... before I went to bed when I wiped it was light pink. Brown again this morning. According to Glow I'm starting my fertile window today. I've already had my period. It was lighter than usual but still had one. I went to the ER last Wednesday for a horrible migraine. Their urine test showed negative. My fiancé told me to take a test last night. So I did. He seen a faint line I didn't. Decided to take another this morning with fmu & I see one. Please tell me I'm not alone