Late period help

Kim

Okay so in October I finished up the pill and then in November I got my period after to the day I usually get it which was a Thursday the 2nd of November. Then in December I got it to the date, which was Saturday the 2nd if Dec. This month I thought I'd get it on the 2nd of January, but nothing, I'm still late. I've taken two tests - negative and use protections always.

Around the time of my "ovulation" I got extremely bad pains on my right ovary for about 7-10 days and my god I was in agony.

With all that combined I'm not sure what to do, I'm freaking out. My periods before the pill were irregular but not to this extent. Can someone please help me out in what to do? I also got diagnosed with endometriosis back in November.