Please help

I missed my period in May. It was due the 28th but I got a positive urine confirmation on the 3rd of June at my doctor's office then period came June 8th. Very mild cramping I think but no blood clots passed and period didn't even fill the pad half full. Last day I had brown discharge. Period was 3 days as usual. I'm now 2 days late according to eve and 1 day late according to Ovia. I have had some mild upper tummy cramping and right pelvic pain tonight. I also had very bad nausea all last week. What could this mean?