need some input plz

Okay so, I had a freakishly light period (I think it was a period anyway. It lasted two maybe three days. I use a menstral cup and my entire three day discharge wouldn't have even filled it. Now today (cycle day 6) I'm starting to feel off. Very simalure sensations to when I was pregnant with my son. Is it possible that wasn't a period and maybe I'm pregnant? I feel like I'm just wishful thinking.