I Could Possibly Be 2-4 Weeks Pregnant I Have Had

I could possibly be 2-4 weeks pregnant i have had swollen sore boobs for about to weeks to the point it hurts to wear my bra or to lean anything on them, i was laying in bed and experiance a gush of dark brown watery dischage i went to the toilet and there were small blood clots and small black looking clots. I am due for my period on about the 13th or the 30th i cant quite remember when i had it last as its always late due to stress. I went to the toliet a few hours after and there was pinkish/red on the toilet paper when i wiped. I have no experiance a gush of pinkish water or anything like that as of yet. After the gush of dischange i felt a little sick and unmotivated but didnt really affect me. It has gotten worse since then. Not sure if its a late period or a miscarriage as i have never experienced a misscarriage and it was alot heavier then my period. I haven't taken a test because i wanted to wait for my period to see if i missed it. What do i need to expect to pass if it is a miscarriage at only 2-4 weeks? Also before all this a few days prior have been getting thick white dischage for 2-3 days
Thank you