endometriosis??

What were the first signs that you had? I know I'm probably overreacting... I do that a lot. I got told a couple months ago that i had fluid behind my uterus but that it was caused from a bacteria infection. My period is normal usually lasts 6days. My last depo shot was Oct 31 of 2017. Then I stopped. I decided i was ready to try for a baby. I got my period back in August and it's normal sometimes it's a couple days late or a day early. This last time it was 11days late, but I was also under a lot of stress with family issues. I know I'm not making sense now... but I searched it up on the internet and I started reading on endometriosis now I'm panicking. Can anybody tell me how you got diagnosed or you symptoms? I have a doctors appointment but not for another couple weeks. They were booked.