Helllllpppp me!!

So since Monday I have been having period like cramps and clear looks like raw egg discharge sore nipples today I can tell the discharge is drying up this is the first time ever that I have experienced cramps like this while I guess I’m ovulating I have been taking ovulation test all week and really haven’t gotten a positive (I can’t read those things.) my question is how long do you cramp for??? I thought maybe it was my period coming on because I have very irregular period! Hoping this is a good sign dies discharge normally dry up after ovulation if pregnant ? Thanks in advance