very loud on motorway

[dirk gently]

Hi,


I have a 2002 berlingo multispace. It has been driving ok and I generally only drive in the city. I just had to drive 300miles on the motorway and as soon as I drove over 50mph the car started making a really loud droning noise and the engine also sounds strange (it is so loud I can not hear the radio even when turned up). I have to drive it back in two days and I am wondering is this a near fatal problem or would it last until I get it to a mechanic.
I have also had new front winter tyres fitted and the suspension seems stiffer and im getting shaking in the steering wheel, the car has been really good before I drove from belfast to berlin and didnt have these problems.
Im a total car noob.


Thanks for any help !