Welcome to the board. I'm sorry you are suffering so much, and at such a young age. My niece is 24 and has severely suffered w/ endometriosis since about 16. That's really all I know about it, and from what I've read here on the board.
You've already received some great advice - and I really don't know that much about what you have... but the one thing I wanted to say was I first became ill at around your age - right before going to college, etc. I was in bed for 6+ months, except for going from doctor to doctor. After about a year of struggling.... I got significantly better - started back to school, went on to get married, have a big family and so forth. I did end up getting ill again (whole other story) when I was about 30.... but age 19 through 30 were wonderful years :)
Point being, I know how discouraging it can be when life is just starting out....and you are dealing w/ health and pain issues. Hang in there the best you can w/ everything. You are doing the right thing by reaching out - and I would keep at that. And I pray that this is just a small moment in time, and you'll find a solution to your issues that will really help.
Take good care. --Tina
Many, many health and pain issues.
Many meds - including Atenolol, Effexor, MS Contin, Dilaudid, Actiq (oral Fentanyl), Soma, Vitamin D, Iron (for anemia), Synthroid...and on the list goes.
Personal: I'm a Christian wife and mother; I have six sons and identical twin daughters.