tmi about my period, but concerned lol

hello ladies...im concerned about my period...about a week ago after having sex with my husband I bled a little and I spotted the next day...i was supposed to get my period of the 1st...today is the 4th and I thought I had gotten it this morning. But, i got nothing else throughout the day...has this ever happened to you? please help! Thanks p.s. I've been about 2 to 3 days late in the past 3 months. before this I've always been regular. lol thanks again!