Pregnancy

Hi guys me and my boyfriend are sexually activate I’ve haven’t been taking birth control in about a year , we do not use contraceptives at all have never had previously also, I’ve had no period in two months and one week I’ve took pregnancy test but all came back negative or not pregnant, and I have been taking prenatal vitamins and I keep getting symptoms and pains in my pelvic area and am I so lost at the minute weather I am pregnant or it’s something else can anyone please help