Obviously you just plain have not put the work in required to pass especially even at this point since you are still seeing new material. Anyone going to any US school should at the very least be able to get a passing score. Step 1 is not something you can study for just a few hours a day. You need probably 6 weeks of at least 10-12 hours a day of good studying. No partying. Very limited going out. etc. Study every single day.
However, if you have yet to even come close to passing despite after taking extra time be prepared to be dismissed by the school, unless you get one more shot with taking a Kaplan course or something. The school is not going to just give you tons of time off since it ultimately hurts their bottom line and because you have not proven yourself in the least to them. It is a harsh reality that you'll have to face at some point. There are other careers besides medicine out there.