Hello i am 24 years old just so y'all know my age.. my menstrual cycle is very regular my period is usually red I never had brown color period this month I started my period 5 days ago and this 5 days my period been really dark brown almost black and it had tissues it had no odor but it had tissues looks like pieces it things not sure how to explain but its almost black. This never happend to me before

My fiance and I been trying for a baby for 4 years now so we do have unprotected sex havent gotten pregnant. Any idea what this is? I have an appointment with m doc next week but as now I'm little freaked out. Any idea ? Thank you!!!