Hey there, sorry to read of you issues and I can understand your frustrations.You said you saw 40 Drs or did I read that wrong? Were they all pediatric physicians ? Perhaps it is time for you to make an appointment with a GI specialist and not mention that you have been seeing pediatricians. At 18 years old you are considered and adult in my part of the world.
Keep advocating for yourself and know we are all here for you.
Kindly,
Kitt