Not sure what to make of this..Too early?

Portia
My bf and i aren't trying to conceive but we don't use protection either. (Pull out method for 3 yrs and counting) but anyways, we made love a couple of days ago and lately I've been feeling funny in my lower abdomen with some mild cramps. I'm not sure whether or not I was ovulating then since I'm irregular with my cycle. It's hard to tell but has anyone ever had this happen to them and what was your outcome?