Yeah a ruptured cyst and maybe even some more growing. Ive been having the same type incidents for a year now but no endo, its a cyst causes all that peeing and such, nausea, tender breast, and pain it even makes my uterus and bladder feel pressure and full and pain down my leg. I am still peeing and cramping like crazy and its been a month since my last rupture! I'm not taking anything for it, just sorta bare the pain. I am just on Birth control pills and giving it time to see what happens all you can do. If it were endo I would think it wouldnt have been so sudden you would of been having painful periods month after month after month. I get severe cyst ruptures all the time very painful and they can last mths for me to heal Ive had a laproscopy no endo no pcos nothing else wrong simply horrible cyst problems, and imbalance of hormones. Every month my period comes I just expect a cyst rupture its becoming that common for me! You might be driving yourself crazy here going from doc to doc, taking all these meds you may not need, and spending your money and perhaps here the first doc was right. Honestly there isnt a lot you can do for ruptured cyst problems its a hormonal thing take BC and as they say enjoy being a woman. Only other thing they do is remove them based on size.
Just my thoughts good luck.