Weird spotting. Anyone have this happen?

On June 30th I swore I was out and period was going to start. Went to the bathroom with cramping and light pink spotting. I usually spot the day before af so I thought she was coming. The next day no spotting. I didn't have any more spotting until the 3rd and it was light brown and didn't even reach a pad and I was also nauseous all day. Should I test soon? My period was due 2 days ago. Anyone ever have this happen??