Does my power break booster need to be changed?

Just recently the breaks on the car are hard to press down when I try to stop and then a ABS light comes on and some other one and I took it into the mechanics a few times because it keeps doing the same thing and plus I went in to do some other things but the problem still persists and I'd have to wait for hours for it to cool down before the car can work again cause it would be close to stalling and the car would start reving real high up to 20 not sure if it would be the power break booster and would need to be changed