Halp. Weird thing in my panties

Okay. So I’ll give you guys all the information I have. I haven’t had my period in two years. I didn’t know why until someone touched my tummy and where the uterus is and they said I was pregnant two years ago but I lost the baby and the placenta is still hooked in my uterus and that’s why I haven’t had my period and I’m very bloated. I’m seeing my doctor on the 18. I had stopped the pill a couple months ago but started it again last month. And yesterday when I wiped after peeing there was a... jelly like dark red stuff? I told my roommate and she said maybe it’s a lack of iron (I forgot to eat meat and beans these past couple of weeks). And I just woke up and there’s that weird thing again. It’s not period blood bits not the same texture. Any idea what it could be out of all the things? Thanks for your help in advance >.<