The most common symptoms of gastritis include: (13) 1  burning sensations in or above the stomach/abdomen, especially around the time of eating. 2  stomachaches or pains. 3  nausea or vomiting. 4  stomach bloating. 5  loss of appetite, feeling very full quickly and possibly experiencing changes in weight. 6  hiccups and burping.
For the most part, taking birth control while pregnant will not cause your baby any harm. This is especially true if you have been using birth control pills early in your pregnancy. But, if you have an IUD and become pregnant, you may be at risk for certain pregnancy complications.
So, even if you are taking birth control pills and decide to take a pregnancy test there is nothing that should affect the outcome of the test other than the fact of whether you are pregnant or not. Women also worry that other things like stress, alcohol, drugs, and the like might affect the outcome of a pregnancy test.