Possible implantation or period?

Samantha • I have an amazing husband we have been together 7 years we have a beautiful little girl who will be 5 in April! We have been ttc since November 2014. I'm a dog groomer 😇😉😍👪💖
My period isn't supposed to be here till the 26th. It was pink spotting around 1 am and just a bit ago it turned brown. I'm not cramping but really constipated and bloated.