Hey There, My Name Is Brooke And I Am Struggling

Hey there,
My name is Brooke and I am struggling with my periods. I have never had an issues with it only untill this last 2 months. I have basically been on my period for the last 2 weeks. My period normally will only last between 4-5 days. What really sucks more is that I am also on birth control and I have not even started the "period" pills. Which means this whole month I will have been on my period. About 5 months ago I went to my women's health care provider and got a full exam bc my pelvic region was hurting. Did ultrasounds, did the works. Everything was normal. I am only 19 year old and don't think I should be having issues like this yet. Sexual patners I have only had one and I am his only as well. This is really getting in the way of our "bedroom" activity as well as my everyday life. I feel sick constantly And my birth control only makes me feel worse. Just thinking about it makes me want to hurl. Every doctor tells me I am fine and its normal to experience this kind of changes. I don't feel normal. I need advice...
Thanks,
Brooke