birth control & pregnancy tests 😅😅😳

So tomorrow I have a doctors appointment and I'm going Ask to be placed on birth control but I'm not sure what's the best one or what to try 😅 I have never been on any type of both control before and I'm scared of it maybe taking to my body wrong can anyone give me advice on what the best first birth control to start with (I know everyone's body's are different) but I want the inputs .. thanks 🙏🏽 also do they test for pregnancy before putting u on birth control?