Is this normal?

Jessica

I got my BFP on Monday, I continued checking every morning and the line gets darker and darker. My period wasn’t due until today or tomorrow. I’ve been experiencing some cramping and discharge when I wipe pink/brownish. Is that normal? Just a little worried over here. I’m 3 weeks today, my 8 week ultrasound isn’t until February 20. Wondering if anyone else has experienced this.