Do I need a lawyer if the arresting officer gave me a summons for refusing to submit to a test?

I was riding down a street when a police in front of me signaled that I turn left. I changed lanes right and rode past him, he immediately pulled me over. He told me he smelled alcohol and to get out the car. He asked me to do a field sobriety test. He asked me to do my ABC's walk one foot in front of the other and to follow the light pen with my eyes. I did them all good. I was arrested and taken to the station where he gave me a breathalyzer, I blow about 3 or 4 times he told me I wasn't doing it right and he's not getting any results. I would be doing a urinalysis. I asked the officer for water so that I could go to the bathroom the office gave me some water. The officer never came back to give me a urine. I sat in the jail for about six hours and was released. A different officer gave me a court summons and told me that the arresting officer said that I refused to submit a test.