I had unprotected sex when I was on my period. Ended up getting my period a couple days late and it only lasted 2 days. Can I be pregnant?

Unlikely. The time frame from ovulation to the last day of menstrual cycle usually average around 14 days. Lack of successful fertilization of ovum causing changes in the hormonal level leading to shedding of the endometrial lining of uterus, which initiates the female menstrual cycle. During the cycle, the uterine lining is not fit for implantation nor available mature ovum for fertilization.