Horrendous pain need advice please ladies!!

Hello everyone. I have suffered from endemetriosis symptoms for a couple months now I have a US scan on my tummy and internal. It showed up that both ovaries had cysts inside and my right ovary is 21cm big and a normal ovary should be under 10cm. Do the pain is so painful. I'm crying myself to sleep every night, I can only take certain pain killers due to my epilepsy medication. I had to go a&e the other night as the psin was awful, I struggled to get up and get dressed and to walk, I started bleeding and being sick. I used a tampon and the pain got worse! Has anyone had any problems using tampons? As I never have till now. It all seems to be getting worse and the docts still think it's also endo! Seeing a gyno on Friday! X