hi could really do with a little help before i take this car to the garage AGAIN! i went to take my daughter to school the car started fine, but as i pulled away and started to drive the car started juddering and shaking! it was a struggle to get to 30mph and felt like the car was really stuggling! thankfully the school is only round the corner! when i got back in the car it started fine and drove normal!i drive this car alot and rely on it! any suggestions as what may be wrong ? i have 2 small children and im pregnant i can not afford to not sort this problem and risk being stranded! any ideas as to what it may be before i go to the garage?? thanks alot x x