Should my arresting officer give me a breathalyzer test when I pass the field tests? And can I fight the charge of DUI?

I was pulled over in Venango County in Pennsylvania for throwing a cigarette out of my car window about a mile or so from where I got pulled over. The officer asked if I been drinking and I said I had a couple drinks and that was it. The officer then asked me to step out of the car and perform a field test. I did the tests and passed them to the beat of my knowledge. He did not state to me whether I passed or failed. He then proceeded to have me do a breathalyzer, which came out as .102. I was then arrested and Aiken to the station for paperwork. They said I was arrested but never read me my rights. They also searched the vehicle without asking for permission to search.