In your situation, excessive SWR indicates damaged components or a faulty replacement antenna.
If the system worked well before the mishap, changing the size of the antenna would have very little, to no effect at all, on the SWR.
CB antenna components are subject to wear and tear from weather, trail damage, and from everyday use. I suggest you buy new CB antenna components including coax cable, and refresh your antenna system.
Progressive Liberalism: Bringing you new ideas so wonderful, they have to include mandatory participation ......
Originally Posted by Ronald W. Reagan: Government is not the solution to our problem; Government is the problem.