sound like implantation?

Alexis • Mom of a little girl ❤️ Aubree Elizabeth Dellinger was born 9/1/28
I spotted brown,pink and sometimes red for 5 days. The spotting happened on the 8th-12th. My af was due the 18th and still hasn't happened. I'm having symptoms like sore nipples, darker areolas, eating more, going to the bathroom more, bloated, gassy. I haven't taken a test yet. Honestly I'm to scared to. I had a miscarriage in march 2016. Could that spotting be implantation?