how do you know if you're having a chemical pregnancy vs a miscarriage? I got the faintest of all faint lines on a cheap dollar store test Thursday afternoon. my period wasnt due until sunday. then I got a different test friday, still pretty faint but more noticeable, boyfriend claims he couldn't see it. so saturday I got a first response & it was faint but he could actually see it. then monday I had 2x where i had light pink spotting. then Tuesday I've had brown discharge. took another dollar store test & a clear blue test, both faint positives but still showing positive. I've been having some mild lower back cramping but it's like constant, kind of feels like sciatic nerve pain minus the shooting down the leg part. I've read if its chemical that you wont need to phone your dr? idk I've never experienced this before & I've never experienced a miscarriage before. I have 5 healthy kids. I would be roughly 4wks 5 days today.