ABS Brake lights on?

I have a problem with my 2008 Acura TL Type S, two months back my car's ABS/Brake and VSA light came on, so we brought it to the dealership because it was still under warranty and they couldn't figure it out but did have to fix the traction control and they also replaced the bakes because they started to grind. The other day I was going slow down a steep hill and got down to the end and they bakes made a noise and a little while later the same lights came on again, it's been cold and dry out but there is still a bunch of sand on the roads here from when it was really icy out and when I press on the brake they felt like there is air pressure in them or something weird, so what could this be? I am so stressed out and I can't afford not to drive it or bring it into the shop until next month.