Having a miscarriage without miscarrying

Ka

So I'm anywhere from 7 - 9 weeks and a couple days ago I started with brown discharge freaked out because I've had 2 miscarriages already and that's how they started. Went to the er and they said everything was fine and baby was perfect, 2 days later I started bleeding and having blood clots, so I was 100% positive that I had lost the baby, but I went to my obgyn the same day and she told me the same thing. Baby was perfect healthy, but I did have a miscarriage 6 months ago never passed it like I did my first one and didn't go in to get checked when it happened. Is it possible I'm passing the old baby? Anyone else gone through this? The blood hasn't been bright red or pink just a dark dark red/brown like old blood and passing tissue. Its stressing me out. 😔