I believe I got endo

My mom had endo after having me but she still got pregnant with my lil sister we are 3 years a part. I believe I have it I have done some research on it I gave birth in March 2016 to a stillborn. When my first period came it lasted 9 days the last two days of my period was heavy and painful, I had pain for a week on an off very painful some days.My next period it was heavy and painful to die for painful some days I couldn't walk that period lasted 4 days. My ovulation was yesterday omg the pain I could have just died it was hard to walk. Ever since I had my second daughter I have been having pain on an off.