Could I be pregnant?

I have had a irregular period for the last couple of months due to weight loss and being more active. I had sex for the first time in a while 2 weeks ago. My boyfriend came inside of me several times. Last Thursday we had sex and afterwards I had started my period. It was heavier than what it was normally and lasted 7 days ( usually 4 days for me) now that I'm off, I'm still having some mild cramps, mood swings, tiredness, and hungry. Is there a possibility that I could be pregnant? How long should it be before I take a pregnancy test? Am I just thinking to much on this?
Asked Oct 30, 2014

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