I had endo. I was diagnosed at 26, after I had my daughter. I went through all the meds that the doctors thought would work but only seemed to make it worse. I had three lap diagnostic to scrap away the endo. The first two last a couple of years each but the last one only worked for three months at that time I was 33 years old. I didn't want anymore children so my doctor and I decided to a complete hysterectomy. I felt better immediately after the surgery. But now this is a big but a few years later I started having the pains again, the very same pains from the endo, my doctor at the time ( I had moved from AL to GA ) was like well it can't be endo as you have nothing for it grow on. I was like hello I did my research and if they missed just one small piece that could have been hiding somewhere then yes it can grow back. I ended up making an appointment with the doctor that did the hysterectomy I didn't care that I had to travel to get to him. Well to make a long story short because of the surgeries I now have what it called a spaghetti hernia that no one wants to fix right now.
My advice don't do anything that you will regret later in life. I wasn't married at the time of my hysterectomy, thankfully I later married someone that didn't want to have children of his own at such a late stage in his life ( 37 ) .
sidenote: My husband did adopt my daughter and he loves her as his own.
Here's my two cents: As far as being a surrogate for someone else, generally surrogates are required to have already had a successful pregnancy. I know this b/c by DH's DIL was a surrogate. BTW- She received a check for $30,000 for doing it. She was friends with the couple already, and still has contact with the baby.