Prego ?

So like two days ago I thought I had an unusual period. It seemed like I would bleed a little then it turned a light brown, then stop again, then turn red, then light brown, then stop....does this sound like implantation blood? Plus it seems like I'm having a lot of watery discharge. Plus some light random cramps now and then. Oh and I've been really exhausted... How long until I can take a pregnancy test? Does this sound familiar to anyone?