opinions please 🙂

So, starting on the 12th of this past month, I got my period (so I thought) and I ended up bleeding for maybe a day at the most. The next three to four days were brown discharge/spotting. Since then, I've had fatigue, dizzy spells, and rather emotional. With my first pregnancy I never had implantation bleeding, so I'm just wondering if anyone else has experienced implantation bleeding, and if so, what is it like?? Would it be too early to test??