Endometriosis?

Hannah • TTC since 1/1/2016 • 2 losses • Endo - PCOS - Uterine Septum • Laparoscopy & Hysteroscopy 6/8/2018 • Not giving up 🙏🏻
We've been trying to conceive for 13 months and my past 2 periods I cramped 5 days before starting. I had excruciating pain the middle of the night throughout my abdomen and back and started heavy the next day. Something just seems off and I figure it's worth looking into, so I have an appointment with RE on the 11th. I had one chemical pregnancy in August. Any input on seeing a specialist for the first time or this type of pain is appreciated!