Please HELP am i pregnant?

okay so, i am currently on loestrin 24 fe for birth control for about 5 months now and at the beginning of this month 5 days into restarting the pill again for the month i let my boyfriend put it in me without a condom on but he didnt finsh and it was only for like 30 seconds. And im really scared because my period was due yesterday and it hasnt come yet. But i also have lost 10 pounds within the last month and i have been eating healthier and i just went off of predinsone that i was one for 7 months. PLEASE help me. i am really scared and im not sure if i should be concerned that i am pregnant. Oh and also i have had really bad craps. THANKS!