New here and just found out i may have endo?

Hi, i am just now finding out i may have endo?! I had a colonoscopy, u/s, ct scans, lapascopy and just had a mri. They didnt see anything with the above scans, but on the mri?! I just dont understand how they saw it on the mri and not the lap?! I had the lap about 6 mos ago. I am pain all the time in one place. This pain burns, sits in the same spot, i cant sit up without being in pain, i never had intercourse pain or bleeding, lower back pain or anything else that i have read, but the pain below my belly button on the left. I will go to my obgyn in sept and talk with her then. I am really concerned about all this and wonder if ill ever get feeling better?!