I would suggest getting it fixed sooner rather than latter, I had a car about 20-25 years ago (it was an '89 Ford with over 100,000 miles at that point), brakes felt a bit off on the way home from work one night, at the first intersection I just thought something felt a little off, at the second one I was sure, at the third one the pedal went to the floor and and I blew through it without slowing down. Thankfully there was no cross traffic and by then I was only a few hundred feet from home, so I used the hand brake to limp home at about 15 mph. In case you have not guessed it by now, the master cylinder failed.