Endo doesnt just 'go'. Nor does it always show up on scans. Endo is incurable. Some people are pushed into remission after surgery! Some for life, some for years and some it just comes straight back.
Ultrasound showed PID. Drs thought i had an STI. A scrape eventually showed infection but STIs come back clear. No cysts, nothing. I had a hydrosalphinx and fluid in my bowel loops. Sent urgently to gynae as have a history of CIN 3 (cancer in situ)
Lap. Diagnosis changed from PIP to stage 4 Deep Infiltrating Endo. 5cm endometrioma. (Left side only). Including sigmoid colon. Sawn up and given Zoladex until major surgery could be organized.
Complained of kidney pain so was given an abdominal ultrasound. Showed benign tumour in liver abd cysts on both ovaries. Finished zoladex.
Got appointment at BSGE. Given pelvic ultrasound *normal* sypposedly.
Put on pill, seen colorectal guy awaiting now *intermediate surgery*
Goes into theatre. Now major surgery. DIE everywhere. Bladder, bowel, both ovaries, fallopians.
1 month later symptoms returned. Tried combi pill. Did nothing. Put on Zoladex for 4 months in May. Ultrasound last month positive for endo.
So in the past 2 years ive had everything from drastic findings to nothing. On treatment and off!
The reason they say only a Lap can confirm or disregard endo is because unless its very severe, it generally doesnt show up.
Try back through NHS and good luck.