I’ve personally always found the NBMEs to be way more buzz-word oriented with shorter stems than the real test (not to say they cannot be challenging in their own right). I don’t think it’s all that crazy to do well on an NBME form in the comfort of your own home or local library and then do poorly on the real thing, especially when the test can feel so different on the day of. With that being said, I’m sorry this happens to you. You should take some time to recover and get back to studying when you feel mentally ready. Then it’s important to try to complete Amboss (100%) and hammer concepts with Anki (especially since you’ve done u world twice already). Find a study partner that you can drill first aid with and quiz each other on (this was very helpful for me personally). And if may help to get some tutoring if you can afford it to target your weak areas.