Endometriosis medication: any experience with Myfembree or Slynd?

I was recenty diagnosed with endometriosis--long time waiting. I've had extremely painful periods since teen years and they've only gotten worse. My doctor gave me 2 options of medication: Myfembree and Slynd. I'm leaning toward Slynd because Myfembree would send me into pre-menopause and I don't want the harsh side effects.
Anyone been treated with either of these meds? How'd they work for you? Also to those with endo, did you go through any other procedures or experiment with other treatment options? Debating if I should get a second opinion with a doctor who would rather perform surgery or something other than medicaton. Not sure what my best option is. Any insight would help