question: Ive been on implanon for around 2 years, and I was taking some antibiotics called sulfameth/trimethoprim last month, and for the past few days Ive been feeling nauseous, tired and having pains in my stomach, though they dont lest very long,. but I took a pregnancy test and it had came up negative. and I was just wondering if it would affect the test. and if that antibiotics would affect the birth control.?