Sex 2wks ago (condom broke). Started period the next day, but was not normal. Only lasted 3day (usually 5) now having mild cramps & mood swings. Norm?

Not likey Prgnant. You are not likely to be pregnant as you had your periods even though lasted 3 days only was the periods when you expected by dates.If you are still concerned do a home pregnancy test and if symptoms persist consult your gynecologist.