Hi girls

AF due in 7 days. Does anyone know this burning/sour PMS feeling that isn’t exactly cramping? I just always get this feeling before a period and I’m getting it now which leads me to believe it’s AF. Does anyone remember from their pregnancies if this feeling ever happened? I know PMS cramps and preg cramps are similar, but this isn’t exactly a cramp. Just a familiar PMS feeling and now I’m sad. I BD’d throughout FW but I think something isn’t right.