When an officer says that my speed appears to be excessive can i fight that portion of my ticket?

I am in PA, I rolled through a stop sign and my speed was less than 10 mph not in a school zone or work zone. The officer wrote me up for careless driving. I believe this was because i couldnt find my proof of insurance, but that is only because he was pressuring me to go faster then had 3 other cars come. He then searched me and when i said i didnt consent to a search he said he didnt need my permission. He searched me. Put me back in my car then wrote me a careless driving ticket. I want to note i have NEVER been pulled over and aside from 2 parking tickets this is my first traffic ticket. They want to put 3 points on my license and suspend my license for 6 months. What do i do in court tomorrow.