Hey girlies, wandering if any of yous with endo have any advice .. I've researched a little online but don't know much about the symptoms.

I started my periods at 13 had no pain until a year after they just hit me out of nowhere n they were unbareable ... They became heavy n ever since I was about 14 I've had a constant soreness in the bottom of my back just above my tail bone , I've had a miscarriage n it took me 9 months ttc even tho I had been having unprotected sex for 2 years before n nothing that was 08/2013 because of this I kinda lost a lot of weight n my periods became irregular (before this they were every 28 days) .. The pain got worse at first only lasted one day then began to last 3 days making me vomit and soak through bedsheets... in the last 5 months I've had irregular bleeding bleeding every other week for 7 days with spotting in between funny enough my pains stopped but I had kinda stabbing pains in my sides. This month it's regulated I've come on cycle day 28 with pains just not unbareable But all month I've thought I was gna come on ... could this be endo? I've had regular sex since my m/c and still no pregnancy???