If you pay to go to trial and your laweyer tells you take a plea that is offered, and you don''t go to trial should you get your trial fee back?

The answer depends on the terms of your engagement letter. Normally, when a lawyer accepts a case on a flat-fee basis, and prepares to do all of the work that would be necessary to try the case, he is entitled to retain the agreed-upon fee, even if the client elects to settle. Read your agreement.