ok i noticed over the course of driving my car that sometimes the brakes will slowly sink to the floor, i have to pump the brakes to get it to get firm again.

im just below the "low line" on the fluid level, so im gonna add some when i get the chance, but do you think that this could be the MC failing on me?

its kinda dangerous when i need to stop quick. The thing still stops, just slowly when this happens.

 

if your brakes are properly bled and not leaking, it is most likely your power booster or master cylander

 

You have to do three related things very soon.
Replace your Brake Master Cylinder, have the Rear Wheel Cylinders inspected and have the Brake Fluid Power Flushed.

You have fallen victim to the consiquences of not having had the brake fluid flushed (changed) periodically. What has happened (if you care to know) is that the Brake Fluid (being alcohol based) absords water over the course of time. When it reaches a point of Super Saturation, the water falls out of suspension and starts to puddle in the bottom of every component in the Brake System. Where, over the course of time, it corrodes everything it touches.
In your case, the first component to fail is your Master Cylinder. The water in the brake fluid has corroded the bore of the cylinder until it reached a point where the cylinder piston seals can no longer seal against the body. Rather than generating and holding pressure, the fluid is leaking past the seal, and the pedal slowly drops to the floor.

P