So I am not on birth control and do not use a condom. I had my period during the first/second week of April and it was normal. Then approximately two weeks later I got my period again, and it was normal as well. My boobs hurt really bad during that period but since has seemed to stop, except on select occasions. I feel hungry more, as if I eat and just want to eat more.
I am wondering if I could be pregnant even if I got my period a week ago. Also, when should I be able to take a test and know for sure.

A side note, I am in graduate school (law school), and my finals were approximately a week after my first period and the second period was a week after I was done with them. I have had my period stop early/not come at all before due to stress. But I don't feel like this is anything new since I have been around this kind of pressure for a year and a half now. This happened when I first started, but now recently.

I don't think its common, but I have heard its possible for some women to have what at least seems to be a regular period during their pregnancies. Usually though it's recommended that you wait until at least the day that your period is due, sometimes even a few more days than that, until you take a pregnancy test. I guess since you got two periods instead of one you could take it now and then if its negative but you still feel out of sorts in a week or so try again. Or you can just to the doctor's. That might be best.