May be experiencing implantaion bleeding? anyone else with experience in implantation bleeding?

okay... so on april 25th and 26th(according to my opk) i was ovulating. and me and my fiance had sex on both those days as well as the 4 days before those dates and 2 days after those dates. my period was expected on may 5th or 6th. but on may 4th i woke up to what looked like the beginning of my period(just some brownish discharge). and it was like that all day only once did i get a pea size blood spot. and the next morning it was gone. hasnt came back since and i experienced light cramps, nothing compared to what i usually get which are really bad. i read that implantation bleeding can occur 7-10 days after conception which does add up with my days that me and my fiance had sex. only symptoms ive had were the spotting and light cramping and tender breast which get super sore then just back to tender. so i just want to know if anybody had any similar experiences or advice for me.