I am going for the endo angle on this. As you need an operation to deal with it I am assuming it is a laparoscopy. Only at this point can they tell you how bad your endo is.
My own laser lap and dye operation went something like this, the consultant said to me "hmmm Unwilling, it is bad in there, I mean really bad, one of your ovaries is scarred to hell and we don't even know if it is producing any eggs, luckily your tubes are clear, the other ovary looks ok but there is so much scar tissue on your ligaments...." this was the point I just froze.
My actual notes from that operation say it will be a fricking miracle if I have children without going down the IVF route. I have seen them.
The difference being, I was and still am married to the man of my dreams who wanted children as badly as I did. And I was 28 at the time of that operation.
I was told when you get the diagnosis of endo you should start to consider a family asap.
I was advised by my consultant after that operation to try for a baby immediately. We did and I became pregnant immediately. It was a complete shock, not just for me and DH but for the consultant too!
So I have 2 miracle babies, who are now 12 and 9 
You only get one shot at this life. Will you regret not having a baby of your own? My friend got to 41, divorced, no boyfriend and wanted a baby. She went down the IVF route as a single parent and had a beautiful baby boy 3 years ago aged 42. Cost her £12,000 and she couldn't be more happy.