Can you be

Could you be pregnant even if you had a period? This period was different than my others. I started off as spotting light pink. Then the next day had half a day of "regular" flow but it went to brown spotting. I'm on day four and it's already done. And they usually last five/six days. My boobs are still sore and I'm still bloated. Both of which usually go away as soon as I start. So it's pretty unusual. Thoughts?