Are all of these symptoms from my birth control pills or could I be pregnant?

Maybe some of you ladies can help me. I have been on Ocella birth control pills for several months now and have just started having these symptoms within the past few weeks. The symptoms are nausea a few times a day, usually in the morning and before bed (without vomiting), headache (not every day), fatigue, bloating, cramping, and abnormal vaginal discharge. Now all of these symptoms are mild, not enough to keep me away from daily activities. But they have me slightly worried because I know they can be just side effects of Ocella OR symptoms of pregnancy or an STD. I made a recent visit to my OB/GYN but haven't gotten my test results back yet and I'm not sure if they test for pregnancy. I am fairly good about taking my pills on time but sometimes I'll be a few hours late, so pregnancy is HIGHLY unlikely but remotely possible for me.