Had unprotected sex on the 28th guy pulled out took Plan B one step pill next day last period was on the 10th of april could I still be pregnant?

Take the test. If you want to know if you are pregnant, take a test. In today's world you do not need to wonder if you are pregnant or not based on symptoms. Pregnancy tests are available at any pharmacy and in minutes you will have your answer. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period.