What does this mean?

Okay so my fiance and I have been trying for a while and now I am almost weeks late. however starting about 2 weeks ago I started having really thick brownish discharge. As time has gone on I also started bleeding brownish with dark clots. .now for a few days I have been bleeding super heavily that I am bleeding through pads quickly..ive read both upsetting and normal things this could be😕 anyone have this happen or know what this is..? Please no rude comments.