ok heres my problem...i ran my box into a 4 ft ditch and ended up with a flat tire..i drove with the donut for about a day and just bought a new tire...its the right size...now as i pulled out of the parking lot, my steering wheel started to shake harder and harder as i went faster...it didnt do this with the donut at all...what could this be?...wheel balancing?...needs an alignment?..i hope there is no real damage...