What you say is true; many scientists say they don't believe in God. But other scientists do -- including some who are outstanding in their specific fields. In fact, some of the most brilliant and devout Christians I've ever had the privilege of meeting were also outstanding scientists and engineers.
On occasion, I've asked some of them why they were believers. Some said that their scientific studies had actually led them to faith in Christ. They had realized that the world they were studying was so complex and so well designed that it couldn't possibly have happened by chance. It had to have had a Designer -- and that led them not only to a belief in God, but also to a personal commitment to Jesus Christ.
Others told me that they had come to faith in God and in Jesus Christ because as scientists they'd come to realize how small we are, and how little we know (or will ever know). Pride, they pointed out, keeps us from God -- and it can be hard for a highly-educated person to be humble and admit they need God.
Don't let pressure from others keep you from following Christ. If God is leading you into science, make it your goal to glorify Him through your studies -- and through your life. Walk with Him every day by studying His Word, the Bible, and through prayer and fellowship with other believers on your campus. Never forget: In Christ "are hidden all the treasures of wisdom and knowledge" (Colossians 2:3).