Hello, I Am Worried That I Might Be Pregnant. I

Hello, I am worried that I might be pregnant. I had intercourse for the first time in 3 years on the 26th of October, and bled on the night of November 10 until the 13th. Then I was spotting on the 14th and stopped. My period was on time but the bleeding was much lighter and shorter than how I usually have it. Could I be pregnant?