SUPER emotional...

I've been on the same birth control for nearly 2 years. I rarely miss a pill. My boyfriend was home the last week of October to the 6th of November. We had sex several times during that time. Our only protection is always just my pill. The week after he left, I had forgotten to pick my prescription up, so I missed 6 pills in a row. I started right back up afterwards. I had my period, but it was unusually light. I assumed it was just from my mess up with the pills. Anyways, for about the last week I've been really emotional. I don't know if it's from just my hormones having to do with the birth control or what. Should I take a pregnancy test? Is there really any reason for me to be worried about that?