Could I be pregnant?

My boyfriend and i have been ttc for 8 months. My period was 1 week late and when it started on june 3rd it was very light and was spotting, which is unusual for me. It also only lasted 4 days, but 2 days of that there was hardly any blood. I've also had very bad nausea and heart burn for about a week now too and I've never had heart burn in my life. Any help/advice would be appreciated!