Endometriosis and a 'stiff ovary'?

Young
I had an internal ultrasound the other day and she said she might have seen endometriosis but that she could have been mistaken. She also said I have a stiff left ovary and it didn't move around when she pushed on it like my right one did. Has anyone ever experienced a 'stiff' ovary or anything like this? Or even know what it really means? And how much harder is it to conceive with endometriosis? And is it treatable? People have been telling me the contraceptives pill helps but I've been on that for 4 years and only just got off it. I'm not going to know exactly what's going on until my doctors app but I'm so worried, and reassurance would be much appreaciated! :)