Arrest, Search, Seizure, Warrant Open warrant in Houston, tx for theft by check

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In 2006 I a check bounce (35.00) because the founds I was looking for was like a day late. I didn't think nothing of it thinking It would go on telechecks and that's it. I just lost a really good job because the employer told me I had an open warrant. What can I do to make this better for me in the future? I would hate for a 35 dollar check to ruin my life. I was told about getting the charge expunge, but someone else said if I was to plead guilty (most likely I will have to do) then I can't get it expunge. I was also thinking about asking the store can I work something out but I don't know. What do you guys think?