Question: Should I continue to try

So on the 18th of August I experienced what i thought was implantation bleeding that lasted maybe a couple of hours. On the 23rd I got what i my period right on schedule. I am usually a 7 day girl but this period lasted 2 days and was not as heavy as my flow normally is. Am I being to optimistic thinking I could be pregnant. I have this weird nauseating feeling throughout the day, fatigue, and cravings. Could I be pregnant?