Birth control changes or pregnancy ?

I changed my birth control in late January or early February and am currently on Lutera. I took my b.c. for the next 4 months, having a period each month, and had my period towards the beginning of June. I was really broke and couldnt afford to buy my b.c. for a couple weeks. At the beginning of July I started up again. Now, 5 days before I'm suppose to get my period, I began having very mild cramps, and spotting. I looked up symptoms of pregnancy, and I do not feel any other symptoms.(backaches, naseau, tender breasts). I don't "feel pregnant" and my body otherwise doesnt seem any different. I am planning on waiting to see if my period comes before taking a pregnancy test. I'm really just hoping my body is outta whack from being off the pill and than being back on it.

Any suggestions or stories of something similar?