1995 s-10 bazer brakes
 

so i was driving home tonight and was going to stop and the pedal went almost all the way down before the car began to stop and the brake light turned on, on the gauge cluster and it is still currently the same. I checked the brake fluid and fuses, and all is well. i was wondering if anyone had any ideas of what is wrong or any things to check out? please just let me know
thanks,
Nick