Going back maybe 12 years I would say that I have always had this uncomfortable feeling in my side - sometimes the left; sometimes the right - I never really saw the dr about it as it was always after my period every month and thought it was 'normal' for me. I also suffer with IBS but recently it has worsened and my periods have changed slightly (I am 40 with 2 children) so I decided to get it checked out by the GP. She sent me to have an ultrasound which came back with a 30mm cyst on my right ovary, she said that it was quite common, not to worry about it and we would rescan in 3-4 months. She assured me it was nothing to worry about (I am a terrible worrier when it comes to my health!) but as I was still suffering with pain/uncomfortableness she would refer me to a gynaecologist to ask for some advice. The cyst is a hemorrhagic cyst and she did say that Endometriosis could be a possibility. I know a little bit about it but I also knew that some women are told they have IBS when they actually have Endometriosis which she said could explain why my IBS has recently worsened.
I guess what I have come on here for is to ask whether from your experience with Endometriosis would you say (and I know you are not Dr's so I won't hold you to it lol) from how I have described my symptoms would you say that this is a possibility for me? The last couple of months I have felt quite tired, my periods are not quite right (they last for a couple of days then stop for a day before starting again - plus the 'end' of my period lasts a lot longer than it used to) and as I mentioned before my IBS is a lot worse than it used to be. I have slight pain in my back now and again and in the pelvic area. I guess I just wanted to 'speak' to someone who is going through it themselves.
Apologies for the long post!