I am 17 and have been with my boyfriend for six months. We started having sex since the first month of going out. After two months I went on the pill and experienced no symptoms at all. Since November I have been experiencing very frequent nausea, breast tenderness, loss of appetite and weight gain. I have not yet taken a test as I am very nervous. Is there any chance I could be pregnant? I have still been having my monthly "bleed" as normal whilst on the pill.