1990 Volvo 240 noise from front

Noises problem
1990 Volvo 240 212000 miles

I have a 90 volvo 240, when we bought the car while backing up and turn tightly I hear a small knock, to me it sounded like the CV joint was going bad. This was 2 months ago and have had no problems until today. I was driving down the hwy when out of no where the car jerked to the right jumping me 2 lanes, and then make a sound that my tire was flat. I pulled over and inspected my tiers they are all fine I even checked for missing tread. I had no choise but to drive it another 8 miles, the whole drive it made a knocking noice that sounded like a flat tire and by the end of the trip the brakes felt funny when I stoped. ANy ideas on what went wrong or what needs fixed?