Can u please red ..thanx...?

ok i had my last mp on april 20 i have a normal 28 day cycle i had during my ovulation days wich was may 3 or 4 dont exacly remember but now am havin some crampings not exacly like period type of thing but there just diffrent and i been having them for the past 3 days i dont think that am about to get my period because i never get it it so early the earliest i had it has been 24 days but can it be that am going to get it or is this normal am also aving alot of headache and verry sleepy and i have been going to the bathroom alot during the day and the night ....am just wondering because this never happend before and i just feel wierd about it 0o0h and when the cramping comes bk sometimes they get really painfull...